| Name | CVE-2023-22796 |
| Description | A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method can cause the regular expression engine to enter a state of catastrophic backtracking. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5372-1 |
| Debian Bugs | 1030050 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rails (PTS) | jessie, jessie (lts) | 2:4.1.8-1+deb8u9 | vulnerable |
| stretch (security), stretch (lts), stretch | 2:4.2.7.1-1+deb9u5 | vulnerable |
| buster (security), buster, buster (lts) | 2:5.2.2.1+dfsg-1+deb10u5 | vulnerable |
| bullseye (security), bullseye | 2:6.0.3.7+dfsg-2+deb11u2 | fixed |
| bookworm | 2:6.1.7.3+dfsg-2~deb12u1 | fixed |
| sid, trixie | 2:6.1.7.3+dfsg-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| rails | source | jessie | (unfixed) | end-of-life | | |
| rails | source | buster | (unfixed) | end-of-life | | |
| rails | source | bullseye | 2:6.0.3.7+dfsg-2+deb11u1 | | DSA-5372-1 | |
| rails | source | (unstable) | 2:6.1.7.3+dfsg-1 | | | 1030050 |
Notes
https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
https://github.com/rails/rails/commit/4b383e6936d7a72b5dc839f526c9a9aeb280acae (6-1-stable)