Vulnerability CVE-2022-27881

Vulnerability Name:

CVE-2022-27881 (CCN-222633)

Assigned:

2022-03-22

Published:

2022-03-22

Updated:

2022-05-12

Summary:

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.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-120

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2022-27881

Source: CCN
Type: Quarkslab's Blog, Tue 22 March 2022
Heap Overflow in OpenBSD's slaacd via Router Advertisement

Source: MISC
Type: Exploit, Patch, Third Party Advisory
https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html

Source: XF
Type: UNKNOWN
openbsd-cve202227881-bo(222633)

Source: MISC
Type: Patch, Release Notes, Vendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sig

Source: CCN
Type: OpenBSD Web site
033_slaacd.patch.sig

Source: MISC
Type: Patch, Release Notes, Vendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sig

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20220506-0005/

Vulnerable Configuration:

Configuration 1:

cpe:/a:openbsd:openbsd:7.0:*:*:*:*:*:*:*

OR cpe:/a:openbsd:openbsd:6.9:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:openbsd:openssh:6.9:-:*:*:*:*:*:*

OR cpe:/a:openbsd:openssh:7.0:-:*:*:*:*:*:*

Denotes that component is vulnerable

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