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CVE-2016-9602

Status Candidate

Overview

Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Related Files

Ubuntu Security Notice USN-3268-1
Posted Apr 25, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3268-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. It was discovered that QEMU incorrectly handled the JAZZ RC4030 device. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Jann Horn discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to access files on the host file system outside of the shared directory and possibly escalate their privileges. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2016-10028, CVE-2016-8667, CVE-2016-9602, CVE-2016-9603, CVE-2016-9908, CVE-2016-9912, CVE-2016-9914, CVE-2017-5552, CVE-2017-5578, CVE-2017-5987, CVE-2017-6505
MD5 | b3ac75a6d47394f88d2460f8be9f50ed
Ubuntu Security Notice USN-3261-1
Posted Apr 20, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3261-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. Li Qiang discovered that QEMU incorrectly handled the 6300esb watchdog. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2016-10028, CVE-2016-10029, CVE-2016-10155, CVE-2016-7907, CVE-2016-8667, CVE-2016-8669, CVE-2016-9381, CVE-2016-9602, CVE-2016-9603, CVE-2016-9776, CVE-2016-9845, CVE-2016-9846, CVE-2016-9907, CVE-2016-9908, CVE-2016-9911, CVE-2016-9912, CVE-2016-9913, CVE-2016-9914, CVE-2016-9915, CVE-2016-9916, CVE-2016-9921, CVE-2016-9922, CVE-2017-2615, CVE-2017-2620, CVE-2017-2633, CVE-2017-5525, CVE-2017-5526, CVE-2017-5552
MD5 | 915cb728441d7f074c130ac020c5589b
Gentoo Linux Security Advisory 201704-01
Posted Apr 11, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201704-1 - Multiple vulnerabilities have been found in QEMU, the worst of which could the worst of which could lead to arbitrary code execution, or cause a Denial of Service condition. Versions less than 2.8.0-r9 are affected.

tags | advisory, denial of service, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2016-9602, CVE-2017-2620, CVE-2017-2630, CVE-2017-5973, CVE-2017-5987, CVE-2017-6058, CVE-2017-6505
MD5 | b43e83a8132603e1a07d80cd66e4737a
QEMU Host Filesystem Arbitrary Access
Posted Feb 18, 2017
Authored by Jann Horn, Google Security Research

QEMU has an issue where virtfs permits a guest to access the entire host filesystem.

tags | advisory
advisories | CVE-2016-9602
MD5 | 44ce981c2743db060165adeb97c78a51
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