CVE-2021-29627 Information

Description

In FreeBSD 13.0-STABLE before n245050 12.2-STABLE before r369525 13.0-RC4 before p0 and 12.2-RELEASE before p6 listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free.

CVSS Vector

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

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc https://security.netapp.com/advisory/ntap-20210423-0007/

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

7.8