CVE-2022-27881

engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation.
Classic Buffer Overflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 76%
VendorProductVersion
openbsdopenbsd
6.9
openbsdopenbsd
7.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html
https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sig
https://security.netapp.com/advisory/ntap-20220506-0005/
https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html
https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sig
https://security.netapp.com/advisory/ntap-20220506-0005/