CVE Vulnerabilities

CVE-2020-21913

Use After Free

Published: Sep 20, 2021 | Modified: Nov 21, 2024
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
5.5 MODERATE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Ubuntu
LOW

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
International_components_for_unicode Unicode * 66.1 (excluding)
Firefox Ubuntu trusty *
Icu Ubuntu bionic *
Icu Ubuntu esm-infra-legacy/trusty *
Icu Ubuntu esm-infra/bionic *
Icu Ubuntu esm-infra/xenial *
Icu Ubuntu trusty *
Icu Ubuntu trusty/esm *
Icu Ubuntu upstream *
Icu Ubuntu xenial *
Thunderbird Ubuntu trusty *

Potential Mitigations

References