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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 45.0esr-1 | — |
| Debian 14 | nss | 2:3.23-1 | — |
| Debian 13 | firefox-esr | 45.0esr-1 | — |
| Debian 13 | nss | 2:3.23-1 | — |
| Debian 12 | firefox-esr | 45.0esr-1 | — |
| Debian 12 | nss | 2:3.23-1 | — |
| Debian 8 | icedove | 38.7.0-1~deb8u1 | DSA-3520-1 |
| Debian 8 | iceweasel | 38.7.0esr-1~deb8u1 | DSA-3510-1 |
| Debian 8 | nss | 2:3.26-1+debu8u1 | DSA-3688-1 |
| Debian 7 | icedove | 38.7.0-1~deb7u1 | DSA-3520-1 |
| Debian 7 | iceweasel | 38.7.0esr-1~deb7u1 | DSA-3510-1 |
| Debian 7 | nss | 2:3.14.5-1+deb7u6 | DLA-480-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | nss | 2:3.21-1ubuntu4 | — |
| Ubuntu 16.04 LTS | thunderbird | 1:38.7.2+build1-0ubuntu0.16.04.1 | USN-2934-1 |
| Ubuntu 14.04 LTS | firefox | 45.0+build2-0ubuntu0.14.04.1 | USN-2917-1 |
| Ubuntu 14.04 LTS | nss | 2:3.21-0ubuntu0.14.04.2 | USN-2924-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:38.7.2+build1-0ubuntu0.14.04.1 | USN-2934-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | nss-util +1 | 3.19.1-9.el7_2 | RHSA-2016:0370 |
| RHEL 6 | nss-util +1 | 3.19.1-5.el6_7 | RHSA-2016:0370 |
| RHEL 5 | nss +3 | 3.19.1-4.el5_11 | RHSA-2016:0371 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Mission Critical 6 | nss-util +1 | 3.13.1-10.el6_2 | RHSA-2016:0495 |
| RHEL 7.1 EUS | nss-util +1 | 3.19.1-5.ael7b_1 | RHSA-2016:0495 |
| RHEL 6.6 EUS | nss-util +1 | 3.19.1-3.el6_6 | RHSA-2016:0495 |
| RHEL 6.5 AUS | nss-util +1 | 3.16.1-4.el6_5 | RHSA-2016:0495 |
| RHEL 6.4 AUS | nss-util +1 | 3.14.3-8.el6_4 | RHSA-2016:0495 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 45.9.0esr-105.1 | SUSE-SU-2017:1248-1 |
| SLES 12 SP2 | java-1_8_0-openjdk | 1.8.0.121-23.4 | SUSE-SU-2017:1248-1 |
| SLES 12 SP2 | mozilla-nspr | 4.13.1-18.1 | SUSE-SU-2017:1248-1 |
| SLES 12 SP2 | mozilla-nss | 3.29.5-57.1 | SUSE-SU-2017:1248-1 |
| SLES 12 SP1 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 12 SP1 | java-1_8_0-openjdk | 1.8.0.121-23.4 | SUSE-SU-2017:1248-1 |
| SLES 12 SP1 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 12 SP1 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 12 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 12 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 12 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES 11 SP4 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES 11 SP4 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES 11 SP4 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP2 | MozillaFirefox | 38.7.0esr-36.3 | SUSE-SU-2016:0909-1 |
| SLES 11 SP2 | mozilla-nspr | 4.12-19.1 | SUSE-SU-2016:0909-1 |
| SLES 11 SP2 | mozilla-nss | 3.20.2-20.1 | SUSE-SU-2016:0909-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 45.9.0esr-105.1 | SUSE-SU-2017:1248-1 |
| SLES for SAP 12 SP2 | java-1_8_0-openjdk | 1.8.0.121-23.4 | SUSE-SU-2017:1248-1 |
| SLES for SAP 12 SP2 | mozilla-nspr | 4.13.1-18.1 | SUSE-SU-2017:1248-1 |
| SLES for SAP 12 SP2 | mozilla-nss | 3.29.5-57.1 | SUSE-SU-2017:1248-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 12 SP1 | java-1_8_0-openjdk | 1.8.0.121-23.4 | SUSE-SU-2017:1248-1 |
| SLES for SAP 12 SP1 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2017:1248-1, SUSE-SU-2016:0727-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2017:1175-1, SUSE-SU-2016:0777-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 45.9.0esr-71.2 | SUSE-SU-2017:1175-1 |
| SUSE OpenStack Cloud 5 | mozilla-nspr | 4.13.1-32.1 | SUSE-SU-2017:1175-1 |
| SUSE OpenStack Cloud 5 | mozilla-nss | 3.29.5-46.1 | SUSE-SU-2017:1175-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 45.9.0esr-71.2 | SUSE-SU-2017:1175-1 |
| SUSE Manager Proxy 2.1 | mozilla-nspr | 4.13.1-32.1 | SUSE-SU-2017:1175-1 |
| SUSE Manager Proxy 2.1 | mozilla-nss | 3.29.5-46.1 | SUSE-SU-2017:1175-1 |
| SUSE Manager 2.1 | MozillaFirefox | 45.9.0esr-71.2 | SUSE-SU-2017:1175-1 |
| SUSE Manager 2.1 | mozilla-nspr | 4.13.1-32.1 | SUSE-SU-2017:1175-1 |
| SUSE Manager 2.1 | mozilla-nss | 3.29.5-46.1 | SUSE-SU-2017:1175-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 45.9.0esr-71.2 | SUSE-SU-2017:1175-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nspr | 4.13.1-32.1 | SUSE-SU-2017:1175-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nss | 3.29.5-46.1 | SUSE-SU-2017:1175-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozilla-nss | 3.26.2-1.1 | openSUSE-SU-2024:10451-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | nss-util +1 | 3.19.1-9.el7_2 | ELSA-2016-0370 |
Advisories 20
- RHSA-2016:0371 Red Hat Security Advisory: nss security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:0495 Red Hat Security Advisory: nss-util security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:0370 Red Hat Security Advisory: nss-util security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2934-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2924-1 nss vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2917-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-480-1 nss - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3688-1 nss - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3520-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3510-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0727-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10451-1 libfreebl3-3.26.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1175-1 Security update for MozillaFirefox, mozilla-nss, mozilla-nspr SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0909-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1248-1 Security update for MozillaFirefox, mozilla-nss, mozilla-nspr, java-1_8_0-openjdk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0777-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2016-0370 Critical: nss-util security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 9, 2016
References
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://bto.bluecoat.com/security-advisory/sa119
- DSA-3688 vendor-advisory
- openSUSE-SU-2016:1557 vendor-advisory
- APPLE-SA-2016-03-21-5 vendor-advisory
- http://www.mozilla.org/security/announce/2016/mfsa2016-35.html
- https://support.apple.com/HT206167
- https://support.apple.com/HT206168
- 84223 vdb-entry
- SUSE-SU-2016:0820 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- APPLE-SA-2016-03-21-1 vendor-advisory
- openSUSE-SU-2016:0731 vendor-advisory
- SUSE-SU-2016:0727 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- USN-2917-1 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- APPLE-SA-2016-03-21-2 vendor-advisory
- DSA-3520 vendor-advisory
- SUSE-SU-2016:0909 vendor-advisory
- DSA-3510 vendor-advisory
- openSUSE-SU-2016:0733 vendor-advisory
- USN-2924-1 vendor-advisory
- 1035215 vdb-entry
- SUSE-SU-2016:0777 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- GLSA-201605-06 vendor-advisory
- APPLE-SA-2016-03-21-3 vendor-advisory
- USN-2934-1 vendor-advisory
- https://support.apple.com/HT206169
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19.2.3_release_notes
- RHSA-2016:0495 vendor-advisory
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21.1_release_notes
- https://support.apple.com/HT206166
- https://bugzilla.mozilla.org/show_bug.cgi?id=1245528
- USN-2917-2 vendor-advisory
- USN-2917-3 vendor-advisory