PT-2020-6129 · Freebsd · Freebsd

Published 2020-12-01 · Updated 2022-05-31 · CVE-2020-7469

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FreeBSD versions 12.2-STABLE before r367402 FreeBSD versions 11.4-STABLE before r368202 FreeBSD versions 12.2-RELEASE before p1 FreeBSD versions 12.1-RELEASE before p11 FreeBSD versions 11.4-RELEASE before p5

Description The issue is related to a use-after-free vulnerability in the handling of routing options for ICMPv6 messages. When processing subsequent options, the packet buffer may be freed, rendering a cached pointer invalid. Later, the network stack may dereference this pointer, potentially causing a use-after-free. This could allow a remote attacker to cause a denial of service.

Recommendations For FreeBSD versions 12.2-STABLE before r367402, update to a version after r367402. For FreeBSD versions 11.4-STABLE before r368202, update to a version after r368202. For FreeBSD versions 12.2-RELEASE before p1, update to a version after p1. For FreeBSD versions 12.1-RELEASE before p11, update to a version after p11. For FreeBSD versions 11.4-RELEASE before p5, update to a version after p5.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2021-03131

CVE-2020-7469

FREEBSD-SA-20_31

Affected Products

Freebsd

References · 10

• https://security.freebsd.org/advisories/FreeBSD-SA-20:31.icmp6.asc · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-7469 · Security Note
• https://bdu.fstec.ru/vul/2021-03131 · Security Note
• https://osv.dev/vulnerability/CVE-2020-7469 · Vendor Advisory
• https://t.me/cvenotify/15583 · Telegram Post
• https://t.me/cvenotify/17927 · Telegram Post
• https://security.netapp.com/advisory/ntap-20210720-0001 · Note
• https://t.me/cvenotify/15545 · Telegram Post
• https://freebsd.org/security/advisories/FreeBSD-SA-20:31.icmp6.asc · Note
• https://t.me/cvenotify/16270 · Telegram Post