CVE-2019-6286 — In LibSass 3

In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::skip_over_scopes in prelexer.hpp when called from Sass::Parser::parse_import(), a similar issue to CVE-2018-11693.

01What is this vulnerability?

In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::skip_over_scopes in prelexer.hpp when called from Sass::Parser::parse_import(), a similar issue to CVE-2018-11693.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2019-01-14T22:00:00.000Z
• Last modified: 2024-08-04T20:16:24.818Z

09References

• github.com — https://github.com/sass/libsass/issues/2815
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html