Multiple vulnerabilities in ConnMan



Published: 2021-02-12
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-26676
CVE-2021-26675
CWE-ID CWE-401
CWE-121
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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ConnMan
Universal components / Libraries / Libraries used by multiple products

Vendor kernel.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU50669

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26676

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due memory leak in gdhcp in ConnMan. A remote attacker on the local network can force the application to leak sensitive stack information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ConnMan: 0.1 - 1.38

External links

http://bugzilla.suse.com/show_bug.cgi?id=1181751
http://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=58d397ba74873384aee449690a9070bacd5676fa
http://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=a74524b3e3fad81b0fd1084ffdf9f2ea469cd9b1
http://git.kernel.org/pub/scm/network/connman/connman.git/tree/ChangeLog
http://lists.debian.org/debian-lts-announce/2021/02/msg00013.html
http://www.debian.org/security/2021/dsa-4847
http://www.openwall.com/lists/oss-security/2021/02/08/2


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Stack-based buffer overflow

EUVDB-ID: #VU50670

Risk: High

CVSSv3.1: 7.7 [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]

CVE-ID: CVE-2021-26675

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within dnsproxy in ConnMan. A remote unauthenticated attacker on the local network can send specially crafted packets to the affected system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ConnMan: 0.1 - 1.38

External links

http://bugzilla.suse.com/show_bug.cgi?id=1181751
http://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=e4079a20f617a4b076af503f6e4e8b0304c9f2cb
http://git.kernel.org/pub/scm/network/connman/connman.git/tree/ChangeLog
http://lists.debian.org/debian-lts-announce/2021/02/msg00013.html
http://www.debian.org/security/2021/dsa-4847
http://www.openwall.com/lists/oss-security/2021/02/08/2


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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