| Name | CVE-2021-42097 |
| Description | GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover). |
| 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-2791-1, DSA-4991-1, ELA-500-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| mailman (PTS) | jessie, jessie (lts) | 1:2.1.18-2+deb8u8 | fixed |
| stretch (security), stretch (lts), stretch | 1:2.1.23-1+deb9u8 | fixed | |
| buster | 1:2.1.29-1+deb10u5 | fixed | |
| buster (security), buster (lts) | 1:2.1.29-1+deb10u2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| mailman | source | jessie | 1:2.1.18-2+deb8u8 | ELA-500-1 | ||
| mailman | source | stretch | 1:2.1.23-1+deb9u7 | DLA-2791-1 | ||
| mailman | source | buster | 1:2.1.29-1+deb10u2 | DSA-4991-1 | ||
| mailman | source | (unstable) | (unfixed) |
Fixed by: https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/revision/1873
https://bugs.launchpad.net/mailman/+bug/1947640
https://mail.python.org/archives/list/mailman-announce@python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
https://www.openwall.com/lists/oss-security/2021/10/21/4
Regression: https://bugs.launchpad.net/mailman/+bug/1954694
Regression fixed by: https://launchpadlibrarian.net/573872803/patch.txt