Vulnerability CVE-2021-26675

Vulnerability Name:

CVE-2021-26675 (CCN-196375)

Assigned:

2021-02-08

Published:

2021-02-08

Updated:

2022-05-23

Summary:

A stack-based buffer overflow in dnsproxy in ConnMan before 1.39 could be used by network adjacent attackers to execute code.

CVSS v3 Severity:

8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/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): Adjacent 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

8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/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): Adjacent 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:

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

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

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

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

Vulnerability Type:

CWE-787

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2021-26675

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1181751

Source: XF
Type: UNKNOWN
connman-cve202126675-bo(196375)

Source: CCN
Type: connman GIT Repository
dnsproxy: Add length checks to prevent buffer overflow

Source: CONFIRM
Type: Patch, Third Party Advisory
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=e4079a20f617a4b076af503f6e4e8b0304c9f2cb

Source: CONFIRM
Type: Release Notes, Third Party Advisory
https://git.kernel.org/pub/scm/network/connman/connman.git/tree/ChangeLog

Source: MISC
Type: Technical Description, Third Party Advisory
https://kunnamon.io/tbone/

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20210209 [SECURITY] [DLA 2552-1] connman security update

Source: CCN
Type: oss-sec Mailing List, Mon, 8 Feb 2021 10:11:05 +0100
Remote code execution in connman

Source: GENTOO
Type: Third Party Advisory
GLSA-202107-29

Source: DEBIAN
Type: Third Party Advisory
DSA-4847

Source: MISC
Type: Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/08/2

Vulnerable Configuration:

Configuration 1:

cpe:/a:intel:connman:*:*:*:*:*:*:*:* (Version < 1.39)

Configuration 2:

cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 3:

cpe:/o:opensuse:leap:15.2:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:intel:connman:1.38:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:112092	P	connman-1.40-2.2 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:105634	P	connman-1.40-2.2 on GA media (Moderate)	2021-10-01
oval:org.opensuse.security:def:11188	P	Security update for connman (Moderate)	2021-03-20
oval:org.opensuse.security:def:96457	P	Security update for connman (Moderate)	2021-03-20
oval:org.opensuse.security:def:103147	P	Security update for connman (Moderate)	2021-03-20
oval:org.opensuse.security:def:109804	P	Security update for connman (Moderate)	2021-03-20
oval:org.opensuse.security:def:111268	P	Security update for connman (Moderate)	2021-03-16

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