CVE-2021-45960 Information

Description

In Expat (aka libexpat) before 2.4.3 a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g. allocating too few bytes or only freeing memory).

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/libexpat/libexpat/issues/531 https://github.com/libexpat/libexpat/pull/534 https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 http://www.openwall.com/lists/oss-security/2022/01/17/3 https://security.netapp.com/advisory/ntap-20220121-0004/ https://www.tenable.com/security/tns-2022-05 https://www.debian.org/security/2022/dsa-5073

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8