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CVE-2012-2840

24
FAUCET Score

CVE-2012-2840 describes an off-by-one error in the exif_convert_utf16_to_utf8 function within the EXIF Tag Parsing Library (libexif) versions prior to 0.6.21. This vulnerability allows remote attackers to trigger a denial of service or potentially execute arbitrary code by supplying specially crafted EXIF tags within an image file. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its network-based attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.6.20CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:*:*:*:*:*:*:*:*
0.6.14CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:0.6.14:*:*:*:*:*:*:*
0.6.15CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:0.6.15:*:*:*:*:*:*:*
0.6.16CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:0.6.16:*:*:*:*:*:*:*
0.6.18CPE matchmatch criteria
cpe:2.3:a:libexif_project:libexif:0.6.18:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.02%
Probability of exploitation in next 30 days
EPSS Percentile
91.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0502 is in the 85th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libexif-0:0.6.21-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libexif-0:0.6.21-5.el6_3
View patch

Vendor Advisories (1)

redhatCVE-2012-2840Moderate

libexif: "exif_convert_utf16_to_utf8()" off-by-one

Jul 12, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-07/msg00015.html
rhn.redhat.com / errata/RHSA-2012-1255.html
secunia.com / advisories/49988
sourceforge.net / mailarchive/message.php
debian.org / security/2012/dsa-2559
securityfocus.com / bid/54437
ubuntu.com / usn/USN-1513-1