CVE catalog
CVE-2018-19837
libsass: CVE-2018-19837
- Severity
- Medium · CVSS 6.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.80% · Oct 25, 2026
In LibSass prior to 3.5.5, Sass::Eval::operator()(Sass::Binary_Expression*) inside eval.cpp allows attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, because of certain incorrect parsing of '%' as a modulo operator in parser.cpp.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libsass | sid | 3.6.5+20231221-3 | fixed |
| Debian | libsass | forky | 3.6.5+20231221-3 | fixed |
| Debian | libsass | trixie | 3.6.5+20231221-3 | fixed |
| Debian | libsass | bookworm | 3.6.5+20220909-1 | fixed |
| Ubuntu | libsass | 16.04 | 3.2.5-1 | vulnerable |
| Ubuntu | libsass | 16.04 | 3.2.5-2 | vulnerable |
| Ubuntu | libsass | 16.04 | 3.3.2-1 | vulnerable |
| Ubuntu | libsass | 16.04 | 3.3.4-1 | vulnerable |
| Ubuntu | libsass | pro | 3.4.3-1 | vulnerable |
| Ubuntu | libsass | pro | 3.4.6-1 | vulnerable |
| Ubuntu | libsass | pro | 3.4.8-1 | vulnerable |
| Ubuntu | libsass | pro | 3.4.8-1ubuntu0.1~esm1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libsass | source | sid | 3.5.4+20180621~c0a6cf3-1 | not yet assigned | Not reported | Not reported |
| Debian | libsass | source | forky | 3.5.4+20180621~c0a6cf3-1 | not yet assigned | Not reported | Not reported |
| Debian | libsass | source | trixie | 3.5.4+20180621~c0a6cf3-1 | not yet assigned | Not reported | Not reported |
| Debian | libsass | source | bookworm | 3.5.4+20180621~c0a6cf3-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libsass1]Fixed
Source package: [libsass]
Details (2)
3.6.5+20220909-1· amd64 · bookwormFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
3.6.5+20220909-1· arm64 · bookwormFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
- [libsass-dev]Fixed
Source package: [libsass]
Details (2)
3.6.5+20220909-1· amd64 · bookwormFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
3.6.5+20220909-1· arm64 · bookwormFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
[Debian 13 (Trixie)]
- [libsass1]Fixed
Source package: [libsass]
Details (2)
3.6.5+20231221-3+b1· amd64 · trixieFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · 13
3.6.5+20231221-3+b1· arm64 · trixieFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · 13
- [libsass-dev]Fixed
Source package: [libsass]
Details (2)
3.6.5+20231221-3+b1· amd64 · trixieFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · 13
3.6.5+20231221-3+b1· arm64 · trixieFixed · Fixed:
3.5.4+20180621~c0a6cf3-1dsa · libsass · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2019_1791-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-19837]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-19837]
- [https://security-tracker.debian.org/tracker/CVE-2018-19837]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]