Out-of-bounds Read in Libsass
CVE-2017-12963
There is an illegal address access in Sass::Eval::operator() in eval.cpp of LibSass 3.4.5, leading to a remote denial of service attack. NOTE: this is similar to CVE-2017-11555 but remains exploitable after the vendor's CVE-2017-11555 fix (available from GitHub after 2017-07-24).
Vulnerability class: Buffer Overflow
EPSS: 0.012 (65.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Libsass — versions 3.4.5
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2017-12963?
- CVE-2017-12963 is a high-severity vulnerability in Libsass, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2017-08-18.
- How severe is CVE-2017-12963?
- High severity. CVSS v3 base score is 7.5 out of 10.