Multiple vulnerabilities in GNU Glibc

Published: 2013-05-02 | Updated: 2020-08-11

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2009-5029 CVE-2011-4609
CWE-ID	CWE-20 CWE-399
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	Glibc Universal components / Libraries / Libraries used by multiple products
Vendor	GNU

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU42856

Risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2009-5029

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the __tzfile_read function in glibc before 2.15 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted timezone (TZ) file, as demonstrated using vsftpd.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Glibc: 2.0 - 2.13

CPE2.3

External links

http://dividead.wordpress.com/2009/06/01/glibc-timezone-integer-overflow/
http://lists.grok.org.uk/pipermail/full-disclosure/2011-December/084452.html
http://sourceware.org/git/?p=glibc.git;a=commit;h=97ac2654b2d831acaa18a2b018b0736245903fd2
http://sourceware.org/ml/libc-alpha/2011-12/msg00037.html
http://bugzilla.redhat.com/show_bug.cgi?id=761245

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Resource management error

EUVDB-ID: #VU42857

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-4609

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No