[USN-5389-1] Libcroco vulnerabilities


========================================================================== Ubuntu Security Notice USN-5389-1 April 26, 2022
libcroco vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM
Summary:
Several security issues were fixed in Libcroco.
Software Description: – libcroco: Cascading Style Sheet (CSS) parsing and manipulation toolkit
Details:
It was discovered that Libcroco was incorrectly accessing data structures when reading bytes from memory, which could cause a heap buffer overflow. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-7960)
It was discovered that Libcroco was incorrectly handling invalid UTF-8 values when processing CSS files. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-8834, CVE-2017-8871)
It was discovered that Libcroco was incorrectly implementing recursion in one of its parsing functions, which could cause an infinite recursion loop and a stack overflow due to stack consumption. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-12825)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 ESM: libcroco-tools 0.6.11-1ubuntu0.1~esm1 libcroco3 0.6.11-1ubuntu0.1~esm1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5389-1 CVE-2017-7960, CVE-2017-8834, CVE-2017-8871, CVE-2020-12825