| Name | CVE-2019-14855 |
| Description | A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 945859 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| gnupg (PTS) | jessie, jessie (lts) | 1.4.18-7+deb8u5 | vulnerable |
| gnupg1 (PTS) | stretch (security), stretch (lts), stretch | 1.4.21-4+deb9u1 | vulnerable |
| buster | 1.4.23-1 | vulnerable |
| bullseye, bookworm | 1.4.23-1.1 | vulnerable |
| sid, trixie | 1.4.23-2 | vulnerable |
| gnupg2 (PTS) | jessie, jessie (lts) | 2.0.26-6+deb8u3 | vulnerable |
| stretch (security) | 2.1.18-8~deb9u2 | vulnerable |
| stretch (lts), stretch | 2.1.18-8~deb9u5 | vulnerable |
| buster (security), buster, buster (lts) | 2.2.12-1+deb10u2 | vulnerable |
| bullseye (security), bullseye | 2.2.27-2+deb11u2 | fixed |
| bookworm | 2.2.40-1.1 | fixed |
| sid, trixie | 2.2.45-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| gnupg | source | (unstable) | (unfixed) | low | | |
| gnupg1 | source | (unstable) | (unfixed) | unimportant | | |
| gnupg2 | source | wheezy | (unfixed) | end-of-life | | |
| gnupg2 | source | (unstable) | 2.2.19-1 | low | | 945859 |
Notes
[buster] - gnupg2 <ignored> (Minor issue)
[stretch] - gnupg2 <no-dsa> (Minor issue)
[jessie] - gnupg2 <ignored> (No backport to version << 2.2.x, low impact, danger of breaking things)
[jessie] - gnupg <ignored> (No backport to version << 2.2.x, low impact, danger of breaking things)
https://dev.gnupg.org/T4755
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=c4f2d9e3e1d77d2f1f168764fcdfed32f7d1dfc4
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=7d9aad63c4f1aefe97da61baf5acd96c12c0278e
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=dd18be979e138dd3712315ee390463e8ee1fe8c1
https://eprint.iacr.org/2020/014.pdf
Negligible security impact for gnupg1 which is only provided to decrypt legacy secrets
[wheezy] - gnupg <ignored> (No backport to version << 2.2.x, low impact, danger of breaking things)