qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a guest agent, which allows attackers to cause a denial of service (API blockage).

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2020:4676 advisory.

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.
    (CVE-2020-14301)

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

  - A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of service. (CVE-2020-1983)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-4676 advisory.

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of service. (CVE-2020-1983)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.
    (CVE-2020-14301)

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-5674 advisory.

    - qemu: don't hold both jobs for suspend (Jonathon Jongsma)  [Orabug: 31073098]  {CVE-2019-20485}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-4000 advisory.

    - qemu: dont take agent and monitor job for shutdown (CVE-2019-20485)
    - qemu: dont hold a monitor and agent job for reboot (CVE-2019-20485)
    - qemu: dont hold monitor and agent job when setting time (CVE-2019-20485)
    - qemu: remove use of qemuDomainObjBeginJobWithAgent() (CVE-2019-20485)
    - qemu: remove qemuDomainObjBegin/EndJobWithAgent() (CVE-2019-20485)
    - storage: Fix daemon crash on lookup storagepool by targetpath (CVE-2020-10703)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of AHV installed on the remote host is prior to 20201105.1021. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20201105.1021 advisory.

  - libpng before 1.6.32 does not properly check the length of chunks against the user limit. (CVE-2017-12652)

  - In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons     could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be     usable for denial-of-service attacks). (CVE-2018-20843)

  - When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger     an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information     disclosure. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
    (CVE-2019-11719)

  - A vulnerability exists where it possible to force Network Security Services (NSS) to sign     CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in     CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This     vulnerability affects Firefox < 68. (CVE-2019-11727)

  - Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited     to a denial of service). This vulnerability affects Firefox < 71. (CVE-2019-11756)

  - file_copy_fallback in gio/gfile.c in GNOME GLib 2.15.0 through 2.61.1 does not properly restrict file     permissions while a copy operation is in progress. Instead, default permissions are used. (CVE-2019-12450)

  - dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical     Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of     symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only     affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own     home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to     read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a     cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent     client connection came from an attacker-chosen uid, allowing authentication bypass. (CVE-2019-12749)

  - A flaw was discovered in ibus in versions before 1.5.22 that allows any unprivileged user to monitor and     send method calls to the ibus bus of another user due to a misconfiguration in the DBus server setup. A     local attacker may use this flaw to intercept all keystrokes of a victim user who is using the graphical     interface, change the input method engine, or modify other input related configurations of the victim     user. (CVE-2019-14822)

  - In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives.
    When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may     contain files with permissions the attacker did not have or in paths he did not have access to. Extracting     those archives from a high-privilege user without carefully reviewing them may lead to the compromise of     the system. (CVE-2019-14866)

  - In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to     document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber)     then resulted in a heap-based buffer over-read. (CVE-2019-15903)

  - The documentation XML-RPC server in Python through 2.7.16, 3.x through 3.6.9, and 3.7.x through 3.7.4 has     XSS via the server_title field. This occurs in Lib/DocXMLRPCServer.py in Python 2.x, and in     Lib/xmlrpc/server.py in Python 3.x. If set_server_title is called with untrusted input, arbitrary     JavaScript can be delivered to clients that visit the http URL for this server. (CVE-2019-16935)

  - In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length     checks. In cases where the application calling the library did not perform a sanity check on the inputs it     could result in a crash due to a buffer overflow. (CVE-2019-17006)

  - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting     in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming     Application Data records will be ignored. This vulnerability affects Firefox < 72. (CVE-2019-17023)

  - In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow     in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent     memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of     service condition on the client system when a user connects to the server. (CVE-2019-17498)

  - On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the     LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition,     allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass     ASLR for a setuid program. (CVE-2019-19126)

  - xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to     newDoc->oldNs. (CVE-2019-19956)

  - An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the     udevadm trigger command, a memory leak may occur. (CVE-2019-20386)

  - xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
    (CVE-2019-20388)

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an     infinite loop when opened by tarfile.open, because _proc_pax lacks header validation. (CVE-2019-20907)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 5.6.45 and prior, 5.7.27 and prior and 8.0.17 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2019-2974)

  - An exploitable code execution vulnerability exists in the quota file functionality of E2fsprogs 1.45.3. A     specially crafted ext4 partition can cause an out-of-bounds write on the heap, resulting in code     execution. An attacker can corrupt a partition to trigger this vulnerability. (CVE-2019-5094)

  - A code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4.
    A specially crafted ext4 directory can cause an out-of-bounds write on the stack, resulting in code     execution. An attacker can corrupt a partition to trigger this vulnerability. (CVE-2019-5188)

  - Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can     result in denial of service (daemon crash). (CVE-2020-12243)

  - When converting coordinates from projective to affine, the modular inversion was not performed in constant     time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80     and Firefox for Android < 80. (CVE-2020-12400)

  - During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar     multiplication was removed, resulting in variable-time execution dependent on secret data. This     vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12401)

  - During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean     Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform     electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes.
    *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected,     but products built on top of it might. This vulnerability affects Firefox < 78. (CVE-2020-12402)

  - A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using     multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling     multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest     threat from this vulnerability is to confidentiality and system availability. (CVE-2020-12403)

  - libcroco through 0.6.13 has excessive recursion in cr_parser_parse_any_core in cr-parser.c, leading to     stack consumption. (CVE-2020-12825)

  - Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and     IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application     is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this     attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12;
    v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.
    (CVE-2020-14422)

  - Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to     potentially exploit heap corruption via a crafted HTML page. (CVE-2020-15999)

  - A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25637)

  - Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are     affected are 5.6.46 and prior, 5.7.28 and prior and 8.0.18 and prior. Difficult to exploit vulnerability     allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS) of MySQL Client. (CVE-2020-2574)

  - Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are     affected are 5.6.47 and prior, 5.7.27 and prior and 8.0.17 and prior. Difficult to exploit vulnerability     allows low privileged attacker with network access via multiple protocols to compromise MySQL Client.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently     repeatable crash (complete DOS) of MySQL Client. (CVE-2020-2752)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions     that are affected are 5.6.47 and prior, 5.7.29 and prior and 8.0.19 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2020-2780)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Stored Procedure). Supported     versions that are affected are 5.6.47 and prior, 5.7.29 and prior and 8.0.19 and prior. Easily exploitable     vulnerability allows high privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2020-2812)

  - When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which     leaked partial information about the nonce used during signature generation. Given an electro-magnetic     trace of a few signature generations, the private key could have been computed. This vulnerability affects     Firefox < 80 and Firefox for Android < 80. (CVE-2020-6829)

  - xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file     situation. (CVE-2020-7595)

  - curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources     that can lead too overwriting a local file when the -J flag is used. (CVE-2020-8177)

  - Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1     allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client     because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking. (CVE-2020-8492)

  - In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the     BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating     the server receiving the TSIG-signed request, could send a truncated response to that request, triggering     an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to     correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and     message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
    (CVE-2020-8622)

  - In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the     BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted     query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with
    --enable-native-pkcs11 * be signing one or more zones with an RSA key * be able to receive queries from     a possible attacker (CVE-2020-8623)

  - In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.11.21, 9.12.1 -> 9.16.5, 9.17.0 -> 9.17.3, also     affects 9.9.12-S1 -> 9.9.13-S1, 9.11.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An     attacker who has been granted privileges to change a specific subset of the zone's content could abuse     these unintended additional privileges to update other contents of the zone. (CVE-2020-8624)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2020:4676 advisory.

  - libslirp 4.0.0, as used in QEMU 4.1.0, has a use-after-free in ip_reass in ip_input.c. (CVE-2019-15890)

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows     crafted packets to cause a denial of service. (CVE-2020-1983)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - An information disclosure vulnerability was found in libvirt in versions before 6.3.0. HTTP cookies used     to access network-based disks were saved in the XML dump of the guest domain. This flaw allows an attacker     to access potentially sensitive information in the domain configuration via the `dumpxml` command.
    (CVE-2020-14301)

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:4676 advisory.

  - QEMU: Slirp: use-after-free during packet reassembly (CVE-2019-15890)

  - libvirt: Potential DoS by holding a monitor job while querying QEMU guest-agent (CVE-2019-20485)

  - libvirt: Potential denial of service via active pool without target path (CVE-2020-10703)

  - libvirt: leak of sensitive cookie information via dumpxml (CVE-2020-14301)

  - libvirt: leak of /dev/mapper/control into QEMU guests (CVE-2020-14339)

  - QEMU: slirp: use-after-free in ip_reass() function in ip_input.c (CVE-2020-1983)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1557 advisory.

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4676 advisory.

    Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware     platforms. The virt:rhel module contains packages which provide user-space components used to run virtual     machines using KVM. The packages also provide APIs for managing and interacting with the virtualized     systems.

    The following packages have been upgraded to a later upstream version: hivex (1.3.18), libguestfs     (1.40.2), libguestfs-winsupport (8.2), libvirt (6.0.0), libvirt-dbus (1.3.0), libvirt-python (6.0.0),     nbdkit (1.16.2), perl-Sys-Virt (6.0.0), qemu-kvm (4.2.0), seabios (1.13.0), SLOF (20191022). (BZ#1810193,     BZ#1844296)

    Security Fix(es):

    * libvirt: leak of /dev/mapper/control into QEMU guests (CVE-2020-14339)

    * QEMU: Slirp: use-after-free during packet reassembly (CVE-2019-15890)

    * libvirt: Potential DoS by holding a monitor job while querying QEMU guest-agent (CVE-2019-20485)

    * QEMU: slirp: use-after-free in ip_reass() function in ip_input.c (CVE-2020-1983)

    * libvirt: Potential denial of service via active pool without target path (CVE-2020-10703)

    * libvirt: leak of sensitive cookie information via dumpxml (CVE-2020-14301)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Security Fix(es) :

  - libvirt: Potential DoS by holding a monitor job while     querying QEMU guest-agent (CVE-2019-20485)

  - libvirt: Potential denial of service via active pool     without target path (CVE-2020-10703)

According to the versions of the libvirt packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles     the holding of a monitor job during a query to a guest     agent, which allows attackers to cause a denial of     service (API blockage).(CVE-2019-20485)

  - It was discovered that libvirtd before versions 4.10.1     and 5.4.1 would permit read-only clients to use the     virDomainSaveImageGetXMLDesc() API, specifying an     arbitrary path which would be accessed with the     permissions of the libvirtd process. An attacker with     access to the libvirtd socket could use this to probe     the existence of arbitrary files, cause denial of     service or cause libvirtd to execute arbitrary     programs.(CVE-2019-10161)

  - The virConnectGetDomainCapabilities() libvirt API,     versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1,     accepts an 'emulatorbin' argument to specify the     program providing emulation for a domain. Since     v1.2.19, libvirt will execute that program to probe the     domain's capabilities. Read-only clients could specify     an arbitrary path for this argument, causing libvirtd     to execute a crafted executable with its own     privileges.(CVE-2019-10167)

  - util/virlog.c in libvirt does not properly determine     the hostname on LXC container startup, which allows     local guest OS users to bypass an intended container     protection mechanism and execute arbitrary commands via     a crafted NSS module.(CVE-2018-6764)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4000 advisory.

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a     guest agent, which allows attackers to cause a denial of service (API blockage). (CVE-2019-20485)

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4000 advisory.

    The libvirt library contains a C API for managing and interacting with the virtualization capabilities of     Linux and other operating systems. In addition, libvirt provides tools for remote management of     virtualized systems.

    Security Fix(es):

    * libvirt: Potential DoS by holding a monitor job while querying QEMU guest-agent (CVE-2019-20485)

    * libvirt: Potential denial of service via active pool without target path (CVE-2020-10703)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the version of the libvirt packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles     the holding of a monitor job during a query to a guest     agent, which allows attackers to cause a denial of     service (API blockage).(CVE-2019-20485)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the version of the libvirt packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - qemu/qemu_driver.c in libvirt before 6.0.0 mishandles     the holding of a monitor job during a query to a guest     agent, which allows attackers to cause a denial of     service (API blockage).(CVE-2019-20485)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Fix iptables No chain/target/match by that name (bz     #1813830)

  - systemd: start libvirtd after firewalld/iptables     services (bz #1697636)

  - CVE-2020-12430: memory leak in domstats may allow     read-only user to perform DoS attack (bz #1828216, bz     #1828190)

  - CVE-2020-10703: Potential denial of service via active     pool without target path (bz #1820690, bz #1816650)

  - CVE-2019-20485: potential DoS by holding a monitor job     while querying QEMU guest-agent (bz #1809741, bz     #1809740)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the version of the libvirt packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - php_zip.c in the zip extension in PHP before 5.5.37,     5.6.x before 5.6.23, and 7.x before 7.0.8 improperly     interacts with the unserialize implementation and     garbage collection, which allows remote attackers to     execute arbitrary code or cause a denial of service     (use-after-free and application crash) via crafted     serialized data containing a ZipArchive     object.(CVE-2019-20485)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update of the libvirt package has been released.

ID	Name	Product	Family	Severity
184870	Rocky Linux 8 : virt:rhel and virt-devel:rhel (RLSA-2020:4676)	Nessus	Rocky Linux Local Security Checks	high
180926	Oracle Linux 8 : virt:ol / and / virt-devel:rhel (ELSA-2020-4676)	Nessus	Oracle Linux Local Security Checks	high
180921	Oracle Linux 7 : libvirt (ELSA-2020-5674)	Nessus	Oracle Linux Local Security Checks	medium
180904	Oracle Linux 7 : libvirt (ELSA-2020-4000)	Nessus	Oracle Linux Local Security Checks	medium
164552	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20201105.1021)	Nessus	Misc.	critical
157535	AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2020:4676)	Nessus	Alma Linux Local Security Checks	high
146032	CentOS 8 : virt:rhel and virt-devel:rhel (CESA-2020:4676)	Nessus	CentOS Local Security Checks	high
142728	Amazon Linux 2 : libvirt (ALAS-2020-1557)	Nessus	Amazon Linux Local Security Checks	medium
142449	RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2020:4676)	Nessus	Red Hat Local Security Checks	high
141679	Scientific Linux Security Update : libvirt on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	medium
141658	EulerOS Virtualization 3.0.2.2 : libvirt (EulerOS-SA-2020-2209)	Nessus	Huawei Local Security Checks	high
141632	CentOS 7 : libvirt (RHSA-2020:4000)	Nessus	CentOS Local Security Checks	medium
141027	RHEL 7 : libvirt (RHSA-2020:4000)	Nessus	Red Hat Local Security Checks	medium
138008	EulerOS Virtualization 3.0.6.0 : libvirt (EulerOS-SA-2020-1789)	Nessus	Huawei Local Security Checks	medium
137794	EulerOS Virtualization for ARM 64 3.0.6.0 : libvirt (EulerOS-SA-2020-1687)	Nessus	Huawei Local Security Checks	medium
137425	Fedora 31 : libvirt (2020-5cd83efda7)	Nessus	Fedora Local Security Checks	medium
136275	EulerOS Virtualization for ARM 64 3.0.2.0 : libvirt (EulerOS-SA-2020-1572)	Nessus	Huawei Local Security Checks	medium
136034	Photon OS 1.0: Libvirt PHSA-2020-1.0-0289	Nessus	PhotonOS Local Security Checks	medium
135865	Photon OS 2.0: Libvirt PHSA-2020-2.0-0228	Nessus	PhotonOS Local Security Checks	medium
135783	Photon OS 3.0: Libvirt PHSA-2020-3.0-0078	Nessus	PhotonOS Local Security Checks	medium

Detections

Analytics

CVE-2019-20485

medium

Tenable Plugins

high

high

medium

medium

critical

high

high

medium

high

medium

high

medium

medium

medium

medium

medium

medium

medium

medium

medium