Bug 570110 – <app-emulation/qemu-2.5.0-r1: rocker: fix an incorrect array bounds check (CVE-2015-8701)

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Agostino Sarubbo 2015-12-29 14:40:27 UTC]

From ${URL} :

Qemu 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.

Upstream patch:
- ---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html

Reference:
- ----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1286971

This issue was discovered by Mr Qinghao Tang of Qihoo 360 Inc.



@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.

[Comment 1 SpanKY 2016-01-18 05:00:26 UTC]

fix is in qemu-2.5.0-r1 in the tree now

http://gitweb.gentoo.org/repo/gentoo.git/commit/?id=96bdea53ec5c2e6d80e30b288043e34bfc766e25

[Comment 2 Agostino Sarubbo 2016-01-26 15:03:07 UTC]

The stabilization happened in bug 571566

[Comment 3 Kristian Fiskerstrand (RETIRED) 2016-01-26 19:04:48 UTC]

Added to existing GLSA draft

[Comment 4 GLSAMaker/CVETool Bot 2016-02-04 09:35:16 UTC]

This issue was resolved and addressed in
 GLSA 201602-01 at https://security.gentoo.org/glsa/201602-01
by GLSA coordinator Kristian Fiskerstrand (K_F).

[Comment 5 Yury German 2016-02-14 17:57:31 UTC]

Re-Opening for cleanup. 

Maintainers, the GLSA has been released please clean up the Vulnerable versions.

[Comment 6 Doug Goldstein (RETIRED) 2016-02-15 15:31:35 UTC]

Thanks for the report. Fixed in http://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d526fe71f108586f62e2efc2ef06a67321d22216