Double Free in macOS - CVE-2021-1875
Published: April 27, 2021
Vulnerability identifier: #VU52622
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1875
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a double free error when processing files within the libxslt library. A remote attacker can trick the victim to open a specially crafted file, trigger heap corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
macOS
watchOS
iPadOS
tvOS
Apple iOS
watchOS
iPadOS
tvOS
Apple iOS
How to mitigate CVE-2021-1875
Install updates from vendor's website.
macOS - addressed in versions 10.14.6 18G9028, 10.15.7 19H1030, 11.3 20E232
watchOS - update to 7.4 18T195
iPadOS - update to 14.5 18E199
tvOS - update to 14.5 18L204
Apple iOS - update to 14.5 18E199
watchOS - update to 7.4 18T195
iPadOS - update to 14.5 18E199
tvOS - update to 14.5 18L204
Apple iOS - update to 14.5 18E199