CVE-2023-22796

NameCVE-2023-22796
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5372-1
Debian Bugs1030050

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rails (PTS)buster2:5.2.2.1+dfsg-1+deb10u3vulnerable
buster (security)2:5.2.2.1+dfsg-1+deb10u5vulnerable
bullseye (security), bullseye2:6.0.3.7+dfsg-2+deb11u2fixed
bookworm2:6.1.7.3+dfsg-1fixed
trixie, sid2:6.1.7.3+dfsg-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
railssourcebullseye2:6.0.3.7+dfsg-2+deb11u1DSA-5372-1
railssource(unstable)2:6.1.7.3+dfsg-11030050

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)
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