Bug 523910 (CVE-2009-3235)

Summary:	CVE-2009-3235 cyrus-impad: CMU sieve buffer overflows
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	jrusnack, mhlavink
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-3235
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-09-23 15:41:08 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:	521011, 521056, 521057, 521058
Bug Blocks:

Description Tomas Hoger 2009-09-17 07:24:52 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2009-3235 to the following vulnerability:

Multiple stack-based buffer overflows in the Sieve plugin in Dovecot
1.0 before 1.0.4 and 1.1 before 1.1.7, as derived from Cyrus libsieve,
allow context-dependent attackers to cause a denial of service (crash)
and possibly execute arbitrary code via a crafted SIEVE script, as
demonstrated by forwarding an e-mail message to a large number of
recipients, a different vulnerability than CVE-2009-2632.

Note: Sieve implementation used in cyrus-imapd is affected by these issues too.

References:
http://dovecot.org/list/dovecot-news/2009-September/000135.html
http://www.kb.cert.org/vuls/id/336053 (for CVE-2009-2632)

Dovecot patches:
http://hg.dovecot.org/dovecot-sieve-1.1/rev/049f22520628
http://hg.dovecot.org/dovecot-sieve-1.1/rev/4577c4e1130d

Cyrus upstream patches:
https://bugzilla.andrew.cmu.edu/cgi-bin/cvsweb.cgi/src/sieve/sieve.y.diff?r1=1.40;r2=1.41;f=h
https://bugzilla.andrew.cmu.edu/cgi-bin/cvsweb.cgi/src/sieve/bc_eval.c.diff?r1=1.14;r2=1.15;f=h
https://bugzilla.andrew.cmu.edu/cgi-bin/cvsweb.cgi/src/sieve/script.c.diff?r1=1.68;r2=1.69;f=h

Comment 1 Tomas Hoger 2009-09-17 07:32:03 UTC

Dovecot update for Fedora 10 already includes these fixes:

https://admin.fedoraproject.org/updates/F10/FEDORA-2009-9559

Dovecot on Fedora 11+ (uses different sieve plugin) and Red Hat Enterprise Linux 4 and 5 (no sieve plugin) are not affected by his flaw.

cyrus-imapd packages in Fedora and Red Hat Enterprise Linux will be updated to address this flaws.

Comment 3 Tomas Hoger 2009-09-17 07:52:14 UTC

Mitigation notes:

All these additional overflows are sprintf()s to static char buffers.  On Red Hat Enterprise Linux 5 and later (including all current Fedora versoins), these overflows are caught by FORTIFY_SOURCE reducing the impact to controlled abort of one of the cyrus-imapd child processes that are later re-spawned by the master.

Comment 4 Fedora Update System 2009-09-18 14:40:56 UTC

cyrus-imapd-2.3.15-1.fc10 has been submitted as an update for Fedora 10.
http://admin.fedoraproject.org/updates/cyrus-imapd-2.3.15-1.fc10?_csrf_token=587baaef7d1faae0b1a721ba81aa239b1b72d48a

Comment 5 Fedora Update System 2009-09-18 14:41:03 UTC

cyrus-imapd-2.3.15-1.fc11 has been submitted as an update for Fedora 11.
http://admin.fedoraproject.org/updates/cyrus-imapd-2.3.15-1.fc11?_csrf_token=587baaef7d1faae0b1a721ba81aa239b1b72d48a

Comment 7 errata-xmlrpc 2009-09-23 14:55:42 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 4

Via RHSA-2009:1459 https://rhn.redhat.com/errata/RHSA-2009-1459.html

Comment 11 Fedora Update System 2009-09-24 05:17:22 UTC

cyrus-imapd-2.3.15-1.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 Fedora Update System 2009-09-24 05:22:56 UTC

cyrus-imapd-2.3.15-1.fc11 has been pushed to the Fedora 11 stable repository.  If problems still persist, please make note of it in this bug report.