CVE-2020-25583

CRITICAL

FreeBSD Buffer Overflow in rtsold DNSSL Option Processing

Title source: llm

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 when processing a DNSSL option, rtsold(8) decodes domain name labels per an encoding specified in RFC 1035 in which the first octet of each label contains the label's length. rtsold(8) did not validate label lengths correctly and could overflow the destination buffer.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_misc

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc

Third Party Advisory x_refsource_confirm

https://security.netapp.com/advisory/ntap-20210423-0004/

Scores

CVSS v3 9.8

EPSS 0.0146

EPSS Percentile 70.6%

Attack Vector NETWORK

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

Details

CWE

CWE-120

Status published

Products (4)

freebsd/freebsd 11.3 (14 CPE variants)

freebsd/freebsd 11.4 (4 CPE variants)

freebsd/freebsd 12.1 (10 CPE variants)

freebsd/freebsd 12.2

Published Mar 29, 2021

Tracked Since Feb 18, 2026