USN-5389-1: Libcroco vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• 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

• libcroco-tools - 0.6.11-1ubuntu0.1~esm1
  Available with Ubuntu Pro
• libcroco3 - 0.6.11-1ubuntu0.1~esm1
  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

• CVE-2020-12825
• CVE-2017-8834
• CVE-2017-8871
• CVE-2017-7960