Description
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | nss | nss versions before 3.58 | — |
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 | nss | 2:3.58-1 | — |
| Debian 13 | nss | 2:3.58-1 | — |
| Debian 12 | nss | 2:3.58-1 | — |
| Debian 10 | nss | 2:3.42.1-1+deb10u7 | DLA-3634-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | nss | 2:3.49.1-1ubuntu1.7 | USN-5410-1 |
| Ubuntu 18.04 LTS | nss | 2:3.35-2ubuntu2.14 | USN-5410-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nspr +1 | 4.32.0-1.el8_4 | RHSA-2021:3572 |
| RHEL 8 | nss +9 | 3.67.0-6.el8_4 | RHSA-2021:3572 |
| RHEL 7 | nss +4 | 3.53.1-7.el7_9 | RHSA-2021:1384 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | nspr +1 | 4.32.0-1.el8_4 | ALSA-2021:3572 |
| AlmaLinux 8 | nss +9 | 3.67.0-6.el8_4 | ALSA-2021:3572 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | nspr | 4.32.0-1.el8_4 | RLSA-2021:3572 |
| Rocky Linux 8 | nss | 3.67.0-6.el8_4 | RLSA-2021:3572 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES 15 SP3 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES 15 SP2 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES 15 SP2 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES 15 SP1 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES 15 SP1 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES 15 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES 15 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES 12 SP5 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP5 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
Show 23 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP4 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP3 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP3 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP2 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES 12 SP2 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLES 11 SP4 | mozilla-nspr | 4.32-33.6.1 | SUSE-RU-2021:14818-1 |
| SLES 11 SP4 | mozilla-nss | 3.68-47.16.1 | SUSE-RU-2021:14818-1 |
| SLES for SAP 15 SP1 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES for SAP 15 SP1 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES for SAP 15 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLES for SAP 15 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLES for SAP 12 SP5 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES for SAP 12 SP5 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLES for SAP 12 SP4 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES for SAP 12 SP4 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLES for SAP 12 SP3 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SLES for SAP 12 SP3 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SLE Micro 5.1 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-2 |
| SLE Micro 5.1 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-2 |
| SLE Micro 5.0 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLE Micro 5.0 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLE HPC 15 SP1 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLE HPC 15 SP1 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SLE HPC 15 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SLE HPC 15 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SUSE OpenStack Cloud Crowbar 9 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud Crowbar 9 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud Crowbar 8 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud Crowbar 8 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud 9 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud 9 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud 8 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SUSE OpenStack Cloud 8 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SUSE Manager Server 4.0 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SUSE Manager Server 4.0 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SUSE Manager Retail Branch Server 4.0 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SUSE Manager Retail Branch Server 4.0 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SUSE Manager Proxy 4.0 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SUSE Manager Proxy 4.0 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nspr | 4.32-33.6.1 | SUSE-RU-2021:14818-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nss | 3.68-47.16.1 | SUSE-RU-2021:14818-1 |
| SUSE HPE Helion OpenStack 8 | mozilla-nspr | 4.32-19.18.1 | SUSE-RU-2021:3116-1 |
| SUSE HPE Helion OpenStack 8 | mozilla-nss | 3.68-58.54.1 | SUSE-RU-2021:3116-1 |
| SUSE Enterprise Storage 6 | mozilla-nspr | 4.32-3.20.1 | SUSE-RU-2021:3115-1 |
| SUSE Enterprise Storage 6 | mozilla-nss | 3.68-3.56.1 | SUSE-RU-2021:3115-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mozilla-nss | 3.69.1-1.2 | openSUSE-SU-2024:11058-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nss | 3.58-r0 | — |
| Alpine v3.23 | nss | 3.58-r0 | — |
| Alpine v3.22 | nss | 3.58-r0 | — |
| Alpine v3.21 | nss | 3.58-r0 | — |
| Alpine v3.20 | nss | 3.58-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nss | 3.58-r0 | — |
| Alpine v3.18 | nss | 3.58-r0 | — |
| Alpine v3.17 | nss | 3.58-r0 | — |
| Alpine v3.16 | nss | 3.58-r0 | — |
| Alpine v3.15 | nss | 3.58-r0 | — |
| Alpine v3.14 | nss | 3.58-r0 | — |
| Alpine v3.13 | nss | 3.58-r0 | — |
| Alpine v3.12 | nss | 3.58-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nss +4 | 3.53.1-7.amzn2 | ALAS2-2021-1664 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nspr +1 | 4.32.0-1.el8_4 | ELSA-2021-3572 |
| Oracle Linux 8 | nss +9 | 3.67.0-6.el8_4 | ELSA-2021-3572 |
| Oracle Linux 7 | nss +4 | 3.53.1-7.el7_9 | ELSA-2021-1384 |
Advisories 14
- ALSA-2021:3572 Moderate: nss and nspr security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:3572 Red Hat Security Advisory: nss and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2021:1384 Red Hat Security Advisory: nss security and bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-5410-1 nss vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-3634-1 nss - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:3572 Moderate: nss and nspr security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-RU-2021:14818-1 Recommended update for mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11058-1 libfreebl3-3.69.1-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2021:3115-2 Recommended update for mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2021:3116-1 Recommended update for mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2021:3115-1 Recommended update for mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2021-3572 Moderate: nss and nspr security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 21, 2021
- ALAS2-2021-1664 Moderate: nss security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2021
- ELSA-2021-1384 Moderate: nss security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 28, 2021
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1887319
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes
- FEDORA-2020-f29254bd5e vendor-advisory
- FEDORA-2020-bb91bf9b8e vendor-advisory
- FEDORA-2020-a857113c7a vendor-advisory
- [mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- [debian-lts-announce] 20231028 [SECURITY] [DLA 3634-1] nss security update mailing-list