Use-after-free in Libxml2 - CVE-2020-27926
Published: November 6, 2020 / Updated: May 14, 2021
Vulnerability identifier: #VU48193
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-27926
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing untrusted input XML input in libxml2. A remote attacker can pass specially crafted data to the library, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Affected software
Libxml2
macOS
iPadOS
Apple iOS
macOS
iPadOS
Apple iOS
How to mitigate CVE-2020-27926
Install update from vendor's website.
Libxml2 - update to 2.9.11
iPadOS - update to 14.2 18B92
Apple iOS - update to 14.2 18B92
iPadOS - update to 14.2 18B92
Apple iOS - update to 14.2 18B92