CVE-2020-25578 Information

Description

In FreeBSD 12.2-STABLE before r368969 11.4-STABLE before r369047 12.2-RELEASE before p3 12.1-RELEASE before p13 and 11.4-RELEASE before p7 several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular tmpfs(5) smbfs(5) autofs(5) and mqueuefs(5) were failing to do so. As a result eight uninitialized kernel stack bytes may be leaked to userspace by these file systems.

CVSS Vector

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

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:01.fsdisclosure.asc https://security.netapp.com/advisory/ntap-20210423-0002/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3