pvrdma_realize in hw/rdma/vmw/pvrdma_main.c in QEMU has a Memory leak after an initialisation error.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4556 advisory.

  - A flaw was found in qemu Media Transfer Protocol (MTP) before version 3.1.0. A path traversal in the in     usb_mtp_write_data function in hw/usb/dev-mtp.c due to an improper filename sanitization. When the guest     device is mounted in read-write mode, this allows to read/write arbitrary files which may lead do DoS     scenario OR possibly lead to code execution on the host. (CVE-2018-16867)

  - hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to     uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).
    (CVE-2018-20191)

  - A flaw was found in qemu Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn't consider that the underlying     filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical     TOCTTOU problem. An attacker with write access to the host filesystem shared with a guest can use this     property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU     process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS.
    (CVE-2018-16872)

  - hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe     ring element with a large num_sge value. (CVE-2018-20124)

  - QEMU can have an infinite loop in hw/rdma/vmw/pvrdma_dev_ring.c because return values are not checked (and
    -1 is mishandled). (CVE-2018-20216)

  - hw/rdma/vmw/pvrdma_cmd.c in QEMU allows attackers to cause a denial of service (NULL pointer dereference     or excessive memory allocation) in create_cq_ring or create_qp_rings. (CVE-2018-20125)

  - hw/rdma/vmw/pvrdma_cmd.c in QEMU allows create_cq and create_qp memory leaks because errors are     mishandled. (CVE-2018-20126)

  - pvrdma_realize in hw/rdma/vmw/pvrdma_main.c in QEMU has a Memory leak after an initialisation error.
    (CVE-2018-20123)

  - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow. (CVE-2019-6778)

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 multiple vulnerabilities as referenced in the ELSA-2019-4640 advisory.

    - x86: Document CVE-2018-12126 CVE-2018-12130 CVE-2018-12127 CVE-2019-11091 as       fixed (Mark Kanda)  [Orabug: 29744956]  {CVE-2018-12126} {CVE-2018-12127}       {CVE-2018-12130} {CVE-2019-11091}
    - Document CVE-2019-8934 and CVE-2019-5008 as fixed (Mark Kanda)  [Orabug: 29715605]  {CVE-2019-5008}     {CVE-2019-8934}
    - device_tree.c: Don't use load_image() (Peter Maydell)  [Orabug: 29715527]  {CVE-2018-20815}
    - slirp: check sscanf result when emulating ident (William Bowling)  [Orabug: 29715525]  {CVE-2019-9824}
    - i2c-ddc: fix oob read (Gerd Hoffmann)  [Orabug: 29715520]  {CVE-2019-3812}
    - scsi-generic: avoid possible out-of-bounds access to r->buf (Paolo Bonzini)  [Orabug: 29259700]     {CVE-2019-6501}

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 remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4713 advisory.

    - Document CVEs as fixed: CVE-2017-9524, CVE-2017-6058, CVE-2017-5931 (Mark Kanda)  [Orabug: 29886908]     {CVE-2017-5931} {CVE-2017-6058} {CVE-2017-9524}
    - pvrdma: release device resources in case of an error (Prasad J Pandit)  [Orabug: 29056678]     {CVE-2018-20123}
    - qxl: check release info object (Prasad J Pandit)  [Orabug: 29886906]  {CVE-2019-12155}
    - target/i386: add MDS-NO feature (Paolo Bonzini)  [Orabug: 29820428]  {CVE-2018-12126} {CVE-2018-12127}     {CVE-2018-12130} {CVE-2019-11091}
    - docs: recommend use of md-clear feature on all Intel CPUs (Daniel P. Berrange)  [Orabug: 29820428]     {CVE-2018-12126} {CVE-2018-12127} {CVE-2018-12130} {CVE-2019-11091}
    - target/i386: define md-clear bit (Paolo Bonzini)  [Orabug: 29820428]  {CVE-2018-12126} {CVE-2018-12127}     {CVE-2018-12130} {CVE-2019-11091}

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.

- fix crash with virgl enabled (bz #1692323)

  - linux-user: make pwrite64/pread64(fd, NULL, 0, offset)     return 0 (bz #1174267)

  - Fix build with latest gluster (bz #1684298)

  - CVE-2018-20123: pvrdma: memory leakage in device hotplug     (bz #1658964)

  - CVE-2018-16872: usb-mtp: path traversal issue (bz     #1659150)

  - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz     #1660315)

  - CVE-2019-6501: scsi-generic: possible OOB access (bz     #1669005)

  - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072)

  - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c     allows for memory disclosure (bz #1678081)

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3923-1 advisory.

    Michael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker     inside the guest could use this issue to read or write arbitrary files and cause a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 18.10. (CVE-2018-16867)

    Michael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker     inside the guest could use this issue to read arbitrary files, contrary to expectations. This issue only     affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16872)

    Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File System support. An attacker inside the     guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-19489)

    Li Quang and Saar Amar discovered multiple issues in the QEMU PVRDMA device. An attacker inside the guest     could use these issues to cause a denial of service, or possibly execute arbitrary code. This issue only     affected Ubuntu 18.10. These issues were resolved by disabling PVRDMA support in Ubuntu 18.10.
    (CVE-2018-20123, CVE-2018-20124, CVE-2018-20125, CVE-2018-20126, CVE-2018-20191, CVE-2018-20216)

    Michael Hanselmann discovered that QEMU incorrectly handled certain i2c commands. A local attacker could     possibly use this issue to read QEMU process memory. This issue only affected Ubuntu 18.04 LTS and Ubuntu     18.10. (CVE-2019-3812)

    It was discovered that QEMU incorrectly handled the Slirp networking back-end. An attacker inside the     guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute     arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would     be isolated by the libvirt AppArmor profile. (CVE-2019-6778)

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

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

ID	Name	Product	Family	Severity
180708	Oracle Linux 7 : qemu (ELSA-2019-4556)	Nessus	Oracle Linux Local Security Checks	high
180647	Oracle Linux 7 : qemu (ELSA-2019-4640)	Nessus	Oracle Linux Local Security Checks	critical
126673	Oracle Linux 7 : qemu (ELSA-2019-4713)	Nessus	Oracle Linux Local Security Checks	high
124467	Fedora 30 : 2:qemu (2019-0664c7724d)	Nessus	Fedora Local Security Checks	high
123457	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : QEMU vulnerabilities (USN-3923-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2018-20123

medium

Tenable Plugins

high

critical

high

high

high