| Name | CVE-2020-27511 |
| Description | An issue was discovered in the stripTags and unescapeHTML components in Prototype 1.7.3 where an attacker can cause a Regular Expression Denial of Service (ReDOS) through stripping crafted HTML tags. |
| 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 | 991898 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| prototypejs (PTS) | jessie, buster, stretch | 1.7.1-3 | vulnerable |
| bullseye | 1.7.1-3.1 | vulnerable |
| sid, trixie, bookworm | 1.7.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| prototypejs | source | (unstable) | 1.7.3-1 | | | 991898 |
Notes
[bullseye] - prototypejs <no-dsa> (Minor issue)
[buster] - prototypejs <no-dsa> (Minor issue)
[stretch] - prototypejs <no-dsa> (Minor issue)
https://github.com/prototypejs/prototype/blame/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md
CVE mentions newer version but vulnerable code exists in older versions too
https://sources.debian.org/src/prototypejs/1.7.1-3/prototype-1.7.1.js/#L617
[jessie] - prototypejs <postponed> (re-check when the fix is available)