Use-after-free in Libxml2 - CVE-2020-27917
Published: November 6, 2020 / Updated: May 14, 2021
Vulnerability identifier: #VU48187
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-2020-27917
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
watchOS
tvOS
iPadOS
Apple iOS
watchOS
tvOS
iPadOS
Apple iOS
How to mitigate CVE-2020-27917
Install update from vendor's website.
Libxml2 - update to 2.9.11
watchOS - update to 7.1 18R590
tvOS - update to 14.2 18K57
iPadOS - update to 14.2 18B92
Apple iOS - update to 14.2 18B92
watchOS - update to 7.1 18R590
tvOS - update to 14.2 18K57
iPadOS - update to 14.2 18B92
Apple iOS - update to 14.2 18B92