SB2019110665 - Multiple vulnerabilities in Sass LibSass

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2019-18798)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave.cpp.

2) NULL pointer dereference (CVE-ID: CVE-2019-18799)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in Sass::Parser::parseCompoundSelector in parser_selectors.cpp. A remote attacker can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/sass/libsass/issues/2999
• https://github.com/sass/libsass/issues/3001