| Name | CVE-2020-25648 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3634-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nss (PTS) | jessie, jessie (lts) | 2:3.26-1+debu8u18 | vulnerable |
| stretch (security) | 2:3.26.2-1.1+deb9u5 | vulnerable |
| stretch (lts), stretch | 2:3.26.2-1.1+deb9u7 | vulnerable |
| buster | 2:3.42.1-1+deb10u5 | vulnerable |
| buster (security) | 2:3.42.1-1+deb10u8 | fixed |
| bullseye (security), bullseye | 2:3.61-1+deb11u3 | fixed |
| bookworm | 2:3.87.1-1 | fixed |
| sid, trixie | 2:3.99-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| nss | source | buster | 2:3.42.1-1+deb10u7 | | DLA-3634-1 | |
| nss | source | (unstable) | 2:3.58-1 | | | |
Notes
[stretch] - nss <no-dsa> (Minor issue)
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.58_release_notes
https://bugzilla.mozilla.org/show_bug.cgi?id=1641480 (private)
Fixed by: https://hg.mozilla.org/projects/nss/rev/57bbefa793232586d27cee83e74411171e128361
[jessie] - nss <no-dsa> (Minor issue)