Bug 435759 (CVE-2008-0072)

Summary:	CVE-2008-0072 Evolution format string flaw
Product:	[Other] Security Response	Reporter:	Josh Bressers <bressers>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	kreilly, mbarnes, mcrha, security-response-team, shillman
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	2.10.3-8.fc7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-03-06 16:58:47 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	435796, 435797, 435798, 435799, 435800, 435801, 435802, 436080, 436081, 436082
Bug Blocks:

Description Josh Bressers 2008-03-03 18:38:30 UTC

Ulf Harnhammar of Secunia Research reported a format string flaw in the way
Evolution parses PGP encrypted messages.

It should be possible for a malicious mail message to abuse this flaw to execute
arbitrary code when a user open the mail message.

Acknowledgements:

Red Hat would like to thank Ulf Härnhammar of Secunia Research for finding
and reporting this issue.

Comment 4 Mark J. Cox 2008-03-04 09:58:59 UTC

Format string flaws are usually detected by FORTIFY_SOURCE which will notice
that the %n is from a writable string and abort.  But this wasn't happening when
testing this flaw.

On RHEL5, the user supplied format string is passed to em_format_format_error()
in evolution which calls g_strdup_vprintf from glib2.  Unfortunately
g_strdup_vprintf in glib2 uses vasprintf, and vasprintf is a function that is
not fortified.  (I'll file a feature request about that and see if we can't get
glibc to fortify vasprintf/asprintf etc.)

Comment 7 Tomas Hoger 2008-03-05 09:39:02 UTC

Public now on Secunia site, lifting embargo:

http://secunia.com/advisories/29057/
http://secunia.com/secunia_research/2008-8/

Comment 9 Fedora Update System 2008-03-05 17:39:13 UTC

evolution-2.10.3-8.fc7 has been submitted as an update for Fedora 7

Comment 10 Fedora Update System 2008-03-05 17:45:29 UTC

evolution-2.12.3-3.fc8 has been submitted as an update for Fedora 8

Comment 11 Fedora Update System 2008-03-06 16:37:51 UTC

evolution-2.10.3-8.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 Fedora Update System 2008-03-06 16:38:11 UTC

evolution-2.12.3-3.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 13 Red Hat Product Security 2008-03-06 16:58:47 UTC

This issue was addressed in:

Red Hat Enterprise Linux:
  http://rhn.redhat.com/errata/RHSA-2008-0177.html
  http://rhn.redhat.com/errata/RHSA-2008-0178.html

Fedora:
  https://admin.fedoraproject.org/updates/F7/FEDORA-2008-2290
  https://admin.fedoraproject.org/updates/F8/FEDORA-2008-2292