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Bug 444804 (CVE-2012-5573) - <net-misc/tor- Denial of Service Vulnerability (CVE-2012-5573)
Summary: <net-misc/tor- Denial of Service Vulnerability (CVE-2012-5573)
Alias: CVE-2012-5573
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [glsa]
Depends on:
Blocks: 447254
  Show dependency tree
Reported: 2012-11-26 15:28 UTC by Agostino Sarubbo
Modified: 2013-01-09 00:29 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2012-11-26 15:28:28 UTC
From :

A vulnerability has been reported in Tor, which can be exploited by malicious people to cause a DoS 
(Denial of Service).

The vulnerability is caused due to an error when handling SENDME cells and can be exploited to e.g. 
cause excessive consumption of memory resources within an entry node.

Upgrade to version
Comment 1 Agostino Sarubbo gentoo-dev 2012-11-26 18:51:34 UTC
@maintainer, can we stabilize ?
Comment 2 Anthony Basile gentoo-dev 2012-11-26 19:57:53 UTC
(In reply to comment #1)
> @maintainer, can we stabilize ?

I knew this was coming, so I got everything ready.  Arch teams target

KEYWORDS="~amd64 ~arm ~ppc ~ppc64 ~sparc ~x86"

I'll take care of arm, ppc and ppc64 in a minute.
Comment 3 Anthony Basile gentoo-dev 2012-11-26 20:36:11 UTC
stable on arm ppc ppc64
Comment 4 Agostino Sarubbo gentoo-dev 2012-11-26 21:01:26 UTC
amd64 stable
Comment 5 Agostino Sarubbo gentoo-dev 2012-11-26 21:01:59 UTC
x86 stable
Comment 6 Anthony Basile gentoo-dev 2012-11-27 20:31:17 UTC
@sparc.  I had USE=nat-pmp and USE=upnp masked for net-misc/tor across all arches and just unmasked them for amd64 and x86.  Testing on arm, mips, ppc and pp64 showed that they now work there so I unmasked them for *all* arches.

When stabilizing tor for sparc, please also test net-libs/libnatpmp and net-libs/miniupnpc and either keyword/stabilize or mask those flags.
Comment 7 Raúl Porcel (RETIRED) gentoo-dev 2012-12-16 19:29:34 UTC
sparc stable
Comment 8 Sean Amoss (RETIRED) gentoo-dev Security 2012-12-16 19:38:16 UTC
Thanks, everyone.

GLSA vote: yes.
Comment 9 Stefan Behte (RETIRED) gentoo-dev Security 2012-12-16 22:12:14 UTC
Vote: yes.
GLSA request filed.
Comment 10 GLSAMaker/CVETool Bot gentoo-dev 2013-01-03 11:43:10 UTC
CVE-2012-5573 (
  The connection_edge_process_relay_cell function in or/relay.c in Tor before maintains circuits even if an unexpected SENDME cell arrives, which
  might allow remote attackers to cause a denial of service (memory
  consumption or excessive cell reception rate) or bypass intended
  flow-control restrictions via a RELAY_COMMAND_SENDME command.
Comment 11 GLSAMaker/CVETool Bot gentoo-dev 2013-01-09 00:29:40 UTC
This issue was resolved and addressed in
 GLSA 201301-03 at
by GLSA coordinator Sean Amoss (ackle).