Bug 909119 (CVE-2013-0288)

Summary:	CVE-2013-0288 nss-pam-ldapd: FD_SET array index error, leading to stack-based buffer overflow
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	dapospis, jhrozek, jrusnack, nalin, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-04-05 00:36:39 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:	912454, 915361, 915362
Bug Blocks:	909124

Description Jan Lieskovsky 2013-02-08 10:58:16 UTC

An array index error, leading to stack-based buffer overflow flaw was found in the way nss-pam-ldapd, a PAM and nsswitch module which uses directory servers, performed management of file descriptors when performing file descriptors activity wait. An attacker could use this flaw to cause processes with a large number of opened file descriptors, that performed name lookups to crash or, potentially, execute arbitrary code with the privileges of the user running the process.

Upstream advisory:
[1] http://arthurdejong.org/nss-pam-ldapd/CVE-2013-0288

Comment 2 Jan Lieskovsky 2013-02-08 11:01:37 UTC

This issue affects the version of the nss-pam-ldapd package, as shipped with Red Hat Enterprise Linux 6.

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This issue affects the version of the nss-pam-ldapd package, as shipped with Fedora release of 17.

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This issue did NOT affect the version of the nss-pam-ldapd package, as shipped with Fedora release of 18 (the functionality in question has been reimplemented to use poll() system call instead, and therefore as such is NOT vulnerable to this problem).

Comment 3 Jan Lieskovsky 2013-02-08 11:02:38 UTC

Acknowledgements:

Red Hat would like to thank Garth Mollett for reporting this issue.

Comment 8 Jan Lieskovsky 2013-02-14 18:09:55 UTC

The CVE identifier of CVE-2013-0288 has been assigned to this issue.

Comment 11 Jan Lieskovsky 2013-02-18 17:21:34 UTC

Created nss-pam-ldapd tracking bugs for this issue

Affects: fedora-17 [bug 912454]

Comment 12 Jan Lieskovsky 2013-02-18 17:30:58 UTC

Open-Source Security mailing list post:
  http://www.openwall.com/lists/oss-security/2013/02/18/2

Comment 14 Jakub Hrozek 2013-02-19 07:55:51 UTC

Upstream backport to Debian:
http://arthurdejong.org/viewvc/nss-pam-ldapd?revision=1926&view=revision

Comment 18 Fedora Update System 2013-02-28 07:10:08 UTC

nss-pam-ldapd-0.7.16-3.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 19 errata-xmlrpc 2013-03-04 21:13:17 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:0590 https://rhn.redhat.com/errata/RHSA-2013-0590.html