CVE-2020-25577 — CRITICAL (9.8)

Vulnerability 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 Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Freebsd	Freebsd	11.4

Related Weaknesses (CWE)

CWE-120

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210423-0001/Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210423-0001/Third Party Advisory

FAQ

What is CVE-2020-25577?

CVE-2020-25577 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 e...

How severe is CVE-2020-25577?

CVE-2020-25577 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2020-25577?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.