Medium severity · published Dec 29, 2016
CVE-2015-8701
QEMU (aka Quick Emulator) built with the Rocker switch emulation support is vulnerable to an off-by-one error
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
QEMU (aka Quick Emulator) built with the Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit (tx) descriptors in 'tx_consume' routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments. A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the QEMU process instance resulting in DoS issue.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QE
Qemu · Qemu
through 2.5.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-8701
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-8701
Mailing List
http://www.openwall.com/lists/oss-security/2015/12/28/6
Mailing List
http://www.openwall.com/lists/oss-security/2015/12/29/1
Third Party Advisory
http://www.securityfocus.com/bid/79706
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1286971
Patch
https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html
Third Party Advisory
https://security.gentoo.org/glsa/201602-01
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