SB2018120318 - Multiple vulnerabilities in Sass LibSass

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Main Vulnerability Database SB2018120318

SB2018120318 - Multiple vulnerabilities in Sass LibSass

Published: December 3, 2018 Updated: August 8, 2020

Security Bulletin ID SB2018120318
Severity
High
Patch available
NO
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2018-19826)

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

** DISPUTED ** In inspect.cpp in LibSass 3.5.5, a high memory footprint caused by an endless loop (containing a Sass::Inspect::operator()(Sass::String_Quoted*) stack frame) may cause a Denial of Service via crafted sass input files with stray '&' or '/' characters. NOTE: Upstream comments indicate this issue is closed as "won't fix" and "works as intended" by design.


2) Use-after-free (CVE-ID: CVE-2018-19827)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

In LibSass 3.5.5, a use-after-free vulnerability exists in the SharedPtr class in SharedPtr.cpp (or SharedPtr.hpp) that may cause a denial of service (application crash) or possibly have unspecified other impact.


3) NULL pointer dereference (CVE-ID: CVE-2018-19797)

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via a crafted sass input file.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References