CVE-2014-1523

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-04-30 · updated 2026-06-17
Weakness: CWE-787

Description

Heap-based buffer overflow in the read_u32 function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted JPEG image.

Affected products

Canonical Ubuntu Linux: 12.04, 12.10, 13.10, 14.04
Debian Linux: 7.0, 8.0
Fedoraproject Fedora: 19, 20
Mozilla Firefox: before 29.0; from 24.0 before 24.5 — fixed in 24.5, 29.0
Mozilla Seamonkey: before 2.26 — fixed in 2.26
Mozilla Thunderbird: before 24.5 — fixed in 24.5
Opensuse: 11.4, 12.3, 13.1
RedHat Enterprise Linux Desktop: 5.0, 6.0
RedHat Enterprise Linux Eus: 6.5
RedHat Enterprise Linux Server: 5.0, 6.0
RedHat Enterprise Linux Server Aus: 6.5
RedHat Enterprise Linux Server Eus: 6.5
RedHat Enterprise Linux Server Tus: 6.5
RedHat Enterprise Linux Workstation: 5.0, 6.0
SUSE Linux Enterprise: 10-sp4, 11-sp1

How to fix

Upgrade to a fixed version: Mozilla Firefox 24.5, 29.0; Mozilla Seamonkey 2.26; Mozilla Thunderbird 24.5. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2014-1523 or the next vulnerability affects your stack