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TITLE:
Debian update for glibc and eglibc

SECUNIA ADVISORY ID:
SA40121

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40121/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40121

RELEASE DATE:
2010-06-10

DISCUSS ADVISORY:
http://secunia.com/advisories/40121/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40121/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=40121

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Debian has issued an update for glibc and eglibc. This fixes some
weaknesses and vulnerabilities, which can be exploited by malicious,
local users to cause a DoS (Denial of Service) and potentially gain
escalated privileges and by malicious people to potentially
compromise a vulnerable system.

1) Integer overflows in the libc "strfmon()" function can be
exploited to cause a crash or potentially execute arbitrary code via
specially crafted format specifiers.

2) The mntent function family does not correctly handle newlines
characters. This can be exploited to e.g. cause a DoS or gain
escalated privileges, but requires that an attacker can inject
newline characters into a mount entry (e.g. via vulnerable mount
helpers).

3) A signedness error when processing certain ELF headers can be
exploited to e.g. execute arbitrary code via a specially crafted ELF
file.

SOLUTION:
Apply updated packages.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Maksymilian Arciemowicz
2) Jeff Layton and Dan Rosenberg
3) Dan Rosenberg

ORIGINAL ADVISORY:
DSA-2058-1:
http://lists.debian.org/debian-security-announce/2010/msg00101.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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