Integer underflow in libexif (Alpine package)

Published: 2012-07-25

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2012-2841
CWE-ID	CWE-191
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	libexif (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Integer underflow

EUVDB-ID: #VU31848

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2012-2841

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer underflow in the exif_entry_get_value function in exif-entry.c in the EXIF Tag Parsing Library. A remote attacker can create a specially crafted file and execute arbitrary code via vectors involving a crafted buffer-size parameter during the formatting of an EXIF tag, leading to a heap-based buffer overflow.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libexif (Alpine package): 0.6.17-r0 - 0.6.20-r1

CPE2.3

External links

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.