CVE-2014-1558
CVE-2014-1558 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 2.0 base score 4.3)
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Mozilla Firefox
- Published:
- Last modified:
Description
Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use UTF-8 character encoding in a required context, a different vulnerability than CVE-2014-1559.
Frequently asked questions
- What is CVE-2014-1558?
- Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use UTF-8 character encoding in a required context, a different vulnerability than CVE-2014-1559.
- How severe is CVE-2014-1558?
- CVE-2014-1558 has a CVSS 2.0 base score of 4.3, rated medium severity.
- Is CVE-2014-1558 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2014-1558?
- CVE-2014-1558 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-2014-1558?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2014-1558 published?
- CVE-2014-1558 was published on 2014-07-23 and last updated on 2026-06-17.
References
- http://secunia.com/advisories/60628
- http://www.mozilla.org/security/announce/2014/mfsa2014-65.html
- http://www.securitytracker.com/id/1030619
- http://www.securitytracker.com/id/1030620
- https://bugzilla.mozilla.org/show_bug.cgi?id=1015973
- https://security.gentoo.org/glsa/201504-01
Affected products (11)
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.3:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.4:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.5:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:24.6:*:*:*:*:*:*:*
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