Out-of-bounds read in QEMU - CVE-2015-8817
Published: December 30, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39956
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2015-8817
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
QEMU (aka Quick Emulator) built to use 'address_space_translate' to map an address to a MemoryRegionSection is vulnerable to an OOB r/w access issue. It could occur while doing pci_dma_read/write calls. Affects QEMU versions >= 1.6.0 and <= 2.3.1. A privileged user inside guest could use this flaw to crash the guest instance resulting in DoS.
How to mitigate CVE-2015-8817
Install update from vendor's website.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=23820dbfc79d1c9dce090b4c555994f2bb6a69b3
- http://git.qemu.org/?p=qemu.git;a=commit;h=c3c1bb99d1c11978d9ce94d1bdcf0705378c1459
- http://rhn.redhat.com/errata/RHSA-2016-2670.html
- http://rhn.redhat.com/errata/RHSA-2016-2671.html
- http://rhn.redhat.com/errata/RHSA-2016-2704.html
- http://rhn.redhat.com/errata/RHSA-2016-2705.html
- http://rhn.redhat.com/errata/RHSA-2016-2706.html
- http://www.openwall.com/lists/oss-security/2016/03/01/1
- http://www.openwall.com/lists/oss-security/2016/03/01/10
- https://bugzilla.redhat.com/show_bug.cgi?id=1300771
- https://lists.gnu.org/archive/html/qemu-stable/2016-01/msg00060.html