#VU31848 Integer underflow in libexif - CVE-2012-2841

Vulnerability identifier: #VU31848

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libexif
Universal components / Libraries / Libraries used by multiple products

Vendor: libexif.sourceforge.net

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: 0.6.9 - 0.6.20

---

External links
https://lists.opensuse.org/opensuse-security-announce/2012-07/msg00014.html
https://lists.opensuse.org/opensuse-security-announce/2012-07/msg00015.html
https://rhn.redhat.com/errata/RHSA-2012-1255.html
https://secunia.com/advisories/49988
https://sourceforge.net/mailarchive/message.php?msg_id=29534027
https://www.debian.org/security/2012/dsa-2559
https://www.securityfocus.com/bid/54437
https://www.ubuntu.com/usn/USN-1513-1

---

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.