Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.5.1.1 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2015/12/28/6Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/29/1Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/79706Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1286971Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.htmlPatchVendor Advisory
- https://security.gentoo.org/glsa/201602-01Third Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/28/6Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/29/1Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/79706Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1286971Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.htmlPatchVendor Advisory
- https://security.gentoo.org/glsa/201602-01Third Party Advisory
FAQ
What is CVE-2015-8701?
CVE-2015-8701 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 descr...
How severe is CVE-2015-8701?
CVE-2015-8701 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-8701?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu.