PT-2022-18663 · Openbsd · Openbsd

Francisco Falcon · Published 2022-03-25 · Updated 2022-05-12 · CVE-2022-27881

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenBSD versions 6.9 through 7.0 before 2022-02-21

Description The issue is related to a buffer overflow in the engine.c file of the slaacd component. This overflow can be triggered by an IPv6 router advertisement that contains more than seven nameservers. It is noted that privilege separation and pledge can prevent the exploitation of this issue.

Recommendations For OpenBSD versions 6.9 through 7.0 before 2022-02-21, consider applying privilege separation and pledge to prevent exploitation until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2022-27881

Affected Products

Openbsd

References · 8

• 🔥 https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-27881 · Security Note
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sig · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-27881 · Vendor Advisory
• https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sig · Vendor Advisory
• https://security.netapp.com/advisory/ntap-20220506-0005 · Note
• https://t.me/cibsecurity/39564 · Telegram Post
• https://t.me/echeloneyes/115 · Telegram Post