Bug 784141 (CVE-2012-0804)

Summary:

CVE-2012-0804 cvs: client proxy_connect heap-based buffer overflow

Product:

[Other] Security Response

Reporter:

Vincent Danen <vdanen>

Component:

vulnerability

Assignee:

Red Hat Product Security <security-response-team>

Status:

CLOSED ERRATA

QA Contact:

Severity:

medium

Docs Contact:

Priority:

medium

Version:

unspecified

CC:

maurizio, ppisar, rcvalle, security-response-team

Target Milestone:

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Keywords:

Security

Target Release:

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Hardware:

All

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2012-02-21 22:42:37 UTC

Type:

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Regression:

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Mount Type:

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Documentation:

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CRM:

Verified Versions:

Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Bug Depends On:

784338, 784339, 784341, 784342, 787683

Bug Blocks:

784142

Attachments:

Description	Flags
proposed patch to correct the flaw in 1.11 branch with back-ported proxy support	none
Proposed fix for cvs development branch 1.12	none

Description Vincent Danen 2012-01-23 22:59:52 UTC

When correcting a crash in CVS [1] it was found that the CVS client suffers from a flaw that causes a heap overflow.  If certain conditions are met, glib SIGABRTs the process because glibc memory management structures become corrupted.  The flaw is in the proxy_connect() function (src/client.c), where sscanf() copies the first word from read_buf to write_buf without checking if there is enough space in write_buf.

This could allow a malicious HTTP proxy server to cause a denial of service to CVS clients or, possibly, execute arbitrary code on the client system with the privileges of the user running cvs, by sending a malicious HTTP response code to the connecting client.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=773699

Comment 2 Vincent Danen 2012-01-23 23:03:26 UTC

Created attachment 557095 [details]
proposed patch to correct the flaw in 1.11 branch with back-ported proxy support

Comment 12 Tomas Hoger 2012-02-06 13:54:01 UTC

Lifting embargo.

Comment 13 Tomas Hoger 2012-02-06 14:07:00 UTC

Created cvs tracking bugs for this issue

Affects: fedora-all [bug 787683]

Comment 14 Petr Pisar 2012-02-07 15:31:50 UTC

Created attachment 559993 [details]
Proposed fix for cvs development branch 1.12

Comment 15 Fedora Update System 2012-02-15 11:29:50 UTC

cvs-1.11.23-17.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 16 Fedora Update System 2012-02-15 11:36:46 UTC

cvs-1.11.23-22.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 17 errata-xmlrpc 2012-02-21 21:17:48 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5

Via RHSA-2012:0321 https://rhn.redhat.com/errata/RHSA-2012-0321.html