In QEMU 3.1, scsi_handle_inquiry_reply in hw/scsi/scsi-generic.c allows out-of-bounds write and read operations.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2425 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines     that use KVM in environments managed by Red Hat products.

    Security Fix(es):

    * QEMU: slirp: heap buffer overflow in tcp_emu() (CVE-2019-6778)

    * QEMU: rtl8139: integer overflow leads to buffer overflow (CVE-2018-17958)

    * QEMU: net: ignore packets with large size (CVE-2018-17963)

    * QEMU: seccomp: blacklist is not applied to all threads (CVE-2018-15746)

    * QEMU: scsi-generic: possible OOB access while handling inquiry request (CVE-2019-6501)

    * QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables (CVE-2019-9824)

    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.

    Bug Fix(es):

    * Update qemu-kvm-rhev for RHEL 7.7 compatibility [OSP-14] (BZ#1728358)

    * Update qemu-kvm-rhev for RHEL 7.7 compatibility [OSP-13] (BZ#1728359)

    * Update qemu-kvm-rhev for RHEL 7.7 compatibility [OSP-10] (BZ#1728360)

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.

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 Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2553 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines     that use KVM in environments managed by Red Hat products.

    Security Fix(es):

    * A flaw was found in the implementation of the fill buffer, a mechanism used by modern CPUs when a     cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page     fault, the execution will continue speculatively with incorrect data from the fill buffer while the data     is fetched from higher level caches. This response time can be measured to infer data in the fill buffer.
    (CVE-2018-12130)

    * Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of     writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore     Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into     these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed     processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use     this flaw to read private data resident within the CPU's processor store buffer. (CVE-2018-12126)

    * Microprocessors use a load port subcomponent to perform load operations from memory or IO. During     a load operation, the load port receives data from the memory or IO subsystem and then provides the data     to the CPU registers and operations in the CPUs pipelines. Stale load operations results are stored in     the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an     attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a     timing side-channel. (CVE-2018-12127)

    * Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated     user to potentially enable information disclosure via a side channel with local access. (CVE-2019-11091)

    * QEMU: device_tree: heap buffer overflow while loading device tree blob (CVE-2018-20815)

    * QEMU: rtl8139: integer overflow leads to buffer overflow (CVE-2018-17958)

    * QEMU: net: ignore packets with large size (CVE-2018-17963)

    * QEMU: scsi-generic: possible OOB access while handling inquiry request (CVE-2019-6501)

    * QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables (CVE-2019-9824)

    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:

    This update also fixes several bugs and adds various enhancements. Documentation for these changes is     available from the Release Notes document linked to in 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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2166 advisory.

    Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm-ma packages provide the user-space component for running virtual machines that     use KVM on the IBM z Systems, IBM Power, and 64-bit ARM architectures.

    Security Fix(es):

    * QEMU: net: ignore packets with large size (CVE-2018-17963)

    * QEMU: scsi-generic: possible OOB access while handling inquiry request (CVE-2019-6501)

    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 7.7 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.

- 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.

ID	Name	Product	Family	Severity
193989	RHEL 7 : qemu-kvm-rhev (RHSA-2019:2425)	Nessus	Red Hat Local Security Checks	critical
180647	Oracle Linux 7 : qemu (ELSA-2019-4640)	Nessus	Oracle Linux Local Security Checks	critical
128205	RHEL 7 : qemu-kvm-rhev (RHSA-2019:2553)	Nessus	Red Hat Local Security Checks	critical
127689	RHEL 7 : qemu-kvm-ma (RHSA-2019:2166)	Nessus	Red Hat Local Security Checks	critical
124467	Fedora 30 : 2:qemu (2019-0664c7724d)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2019-6501

medium

Tenable Plugins

critical

critical

critical

critical

high