Denial of service in wpa_supplicant



| Updated: 2022-01-17
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-27803
CWE-ID CWE-399
Exploitation vector Local
Public exploit N/A
Vulnerable software
 wpa_supplicant
Server applications / Encryption software

Vendor Jouni Malinen

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated 17.01.2022

Added fixed version.

1) Resource management error

EUVDB-ID: #VU55968

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-27803

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources when processing P2P (Wi-Fi Direct) provision discovery requests in p2p/p2p_pd in wpa_supplicant. A remote attacker within radio range can send specially crafted request to the system and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wpa_supplicant: 0.2 - 2.9

CPE2.3 External links

https://w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txt
https://w1.fi/security/2021-1/0001-P2P-Fix-a-corner-case-in-peer-addition-based-on-PD-R.patch
https://www.openwall.com/lists/oss-security/2021/02/25/3
https://www.openwall.com/lists/oss-security/2021/02/27/1
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KOGP2VIVVXXQ6CZ2HU4DKGPDB4WR24XF/
https://lists.debian.org/debian-lts-announce/2021/03/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZGUR5XFHATVXTRAEJMODS7ROYHA56NX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEHS2CFGH3KCSNPHBHNGN5SGV6QPMLZ4/
https://www.debian.org/security/2021/dsa-4898


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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