CVE-2016-1950
CVE-2016-1950 is a high-severity vulnerability in Mozilla Network Security Services with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Mozilla Network Security Services
- Published:
- Last modified:
Description
Heap-based buffer overflow in Mozilla Network Security Services (NSS) before 3.19.2.3 and 3.20.x and 3.21.x before 3.21.1, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to execute arbitrary code via crafted ASN.1 data in an X.509 certificate.
Frequently asked questions
- What is CVE-2016-1950?
- Heap-based buffer overflow in Mozilla Network Security Services (NSS) before 3.19.2.3 and 3.20.x and 3.21.x before 3.21.1, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to execute arbitrary code via crafted ASN.1 data in an X.509 certificate.
- How severe is CVE-2016-1950?
- CVE-2016-1950 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2016-1950 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2016-1950?
- CVE-2016-1950 primarily affects Mozilla Network Security Services. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2016-1950?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2016-1950 published?
- CVE-2016-1950 was published on 2016-03-13 and last updated on 2026-06-17.
References
- http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html
- http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html
- http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html
- http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00027.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00050.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00068.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00093.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00016.html
- http://rhn.redhat.com/errata/RHSA-2016-0495.html
- http://www.debian.org/security/2016/dsa-3510
- http://www.debian.org/security/2016/dsa-3520
- http://www.debian.org/security/2016/dsa-3688
- http://www.mozilla.org/security/announce/2016/mfsa2016-35.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/84223
- http://www.securitytracker.com/id/1035215
- http://www.ubuntu.com/usn/USN-2917-1
- http://www.ubuntu.com/usn/USN-2917-2
- http://www.ubuntu.com/usn/USN-2917-3
- http://www.ubuntu.com/usn/USN-2924-1
- http://www.ubuntu.com/usn/USN-2934-1
- https://bto.bluecoat.com/security-advisory/sa119
- https://bugzilla.mozilla.org/show_bug.cgi?id=1245528
Affected products (30)
- cpe:2.3:a:mozilla:network_security_services:3.19.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:network_security_services:3.20:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:network_security_services:3.20.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:network_security_services:3.21:*:*:*:*:*:*:*
- 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:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.6.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:38.6.1:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:linux:5.0:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:vm_server:3.2:*:*:*:*:*:*:*
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:glassfish_server:2.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:iplanet_web_proxy_server:4.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:iplanet_web_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
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