| Name | CVE-2017-18640 |
| Description | The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564. |
| 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 | 952683 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| snakeyaml (PTS) | jessie, jessie (lts) | 1.12-2+deb8u1 | vulnerable |
| stretch (lts), stretch | 1.17-1+deb9u1 | vulnerable |
| buster (security), buster, buster (lts) | 1.23-1+deb10u1 | vulnerable |
| bullseye | 1.28-1+deb11u2 | fixed |
| sid, trixie, bookworm | 1.33-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| snakeyaml | source | (unstable) | 1.25+ds-3 | | | 952683 |
Notes
[buster] - snakeyaml <no-dsa> (Minor issue)
[stretch] - snakeyaml <no-dsa> (Minor issue)
[jessie] - snakeyaml <no-dsa> (unclear security impact)
https://bitbucket.org/asomov/snakeyaml/issues/377/allow-configuration-for-preventing-billion
Patch to introduce a configuration option to restrict aliases for
collections:
https://bitbucket.org/asomov/snakeyaml/commits/da11ddbd91c1f8392ea932b37fa48110fa54ed8c