CVE-2021-26272

NameCVE-2021-26272
DescriptionIt was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs982587

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ckeditor (PTS)jessie, jessie (lts)4.4.4+dfsg1-3+deb8u2fixed
stretch (security)4.5.7+dfsg-2+deb9u1vulnerable
stretch (lts), stretch4.5.7+dfsg-2+deb9u2vulnerable
buster4.11.1+dfsg-1vulnerable
bullseye4.16.0+dfsg-2fixed
bookworm4.19.1+dfsg-1fixed
sid, trixie4.22.1+dfsg1-2fixed
ckeditor3 (PTS)stretch3.6.6.1+dfsg-1fixed
buster3.6.6.1+dfsg-3fixed
sid, bullseye, trixie, bookworm3.6.6.1+dfsg-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ckeditorsourcejessie(not affected)
ckeditorsource(unstable)4.16.0+dfsg-1982587
ckeditor3source(unstable)(not affected)

Notes

[buster] - ckeditor <no-dsa> (Minor issue)
[stretch] - ckeditor <postponed> (Fix along next DLA)
- ckeditor3 <not-affected> (autolink plugin introduced in v4.5)
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
https://github.com/ckeditor/ckeditor4/commit/467cc95b666d65ba9dc84c05dd760a00395a353a (4.16.0)
[jessie] - ckeditor <not-affected> (autolink plugin introduced in v4.5)

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