CVE-2015-4493
CVE-2015-4493 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: Critical (CVSS 2.0 base score 9.3)
- EPSS exploit prediction: 7% (94th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Mozilla Firefox
- Published:
- Last modified:
Description
Heap-based buffer overflow in the stagefright::ESDS::parseESDescriptor function in libstagefright in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code via an invalid size field in an esds chunk in MPEG-4 video data, a related issue to CVE-2015-1539.
Frequently asked questions
- What is CVE-2015-4493?
- Heap-based buffer overflow in the stagefright::ESDS::parseESDescriptor function in libstagefright in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code via an invalid size field in an esds chunk in MPEG-4 video data, a related issue to CVE-2015-1539.
- How severe is CVE-2015-4493?
- CVE-2015-4493 has a CVSS 2.0 base score of 9.3, rated critical severity.
- Is CVE-2015-4493 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2015-4493?
- CVE-2015-4493 primarily affects Mozilla Firefox. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2015-4493?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2015-4493 published?
- CVE-2015-4493 was published on 2015-08-16 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
- http://rhn.redhat.com/errata/RHSA-2015-1586.html
- http://www.debian.org/security/2015/dsa-3333
- http://www.mozilla.org/security/announce/2015/mfsa2015-83.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securitytracker.com/id/1033247
- http://www.ubuntu.com/usn/USN-2702-1
- http://www.ubuntu.com/usn/USN-2702-2
- http://www.ubuntu.com/usn/USN-2702-3
- https://bugzilla.mozilla.org/show_bug.cgi?id=1186718
- https://hg.mozilla.org/mozilla-central/rev/a674c7019cb5
- https://security.gentoo.org/glsa/201605-06
Affected products (11)
- cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
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