CVE-2020-25577 Information

Description

In FreeBSD 12.2-STABLE before r368250 11.4-STABLE before r368253 12.2-RELEASE before p1 12.1-RELEASE before p11 and 11.4-RELEASE before p5 rtsold(8) does not verify that the RDNSS option does not extend past the end of the received packet before processing its contents. While the kernel currently ignores such malformed packets it passes them to userspace programs. Any programs expecting the kernel to do validation may be vulnerable to an overflow.

CVSS Vector

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

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc https://security.netapp.com/advisory/ntap-20210423-0001/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8