Resource exhaustion in Sass-Lang Libsass
CVE-2018-19838
In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/sass/libsass/issues/2660 (Exploit, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html (vendor-advisory)
Frequently asked questions
- What is CVE-2018-19838?
- CVE-2018-19838 is a medium-severity vulnerability in Sass-Lang Libsass, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2018-12-04.
- How severe is CVE-2018-19838?
- Medium severity. CVSS v3 base score is 6.5 out of 10.