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CVE-2015-8701

Date: December 29, 2016

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.

Language: C

Severity Score

Related Resources (9)

http://www.securityfocus.com/bid/79706
https://security.gentoo.org/glsa/201602-01
https://nvd.nist.gov/vuln/detail/CVE-2015-8701
https://security-tracker.debian.org/tracker/CVE-2015-8701
http://www.openwall.com/lists/oss-security/2015/12/28/6
https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html
http://www.openwall.com/lists/oss-security/2015/12/29/1
https://bugzilla.redhat.com/show_bug.cgi?id=1286971
https://www.mend.io/vulnerability-database/CVE-2015-8701

Severity Score

Weakness Type (CWE)

Numeric Errors

CWE-189

Off-by-one Error

CWE-193

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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