#VU55968 Resource management error in wpa_supplicant - CVE-2021-27803
Published: August 18, 2021 / Updated: January 17, 2022
Vulnerability identifier: #VU55968
Vulnerability risk: Medium
CVSSv4.0: 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
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
wpa_supplicant
wpa_supplicant
Software vendor:
Jouni Malinen
Jouni Malinen
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.
Remediation
Install update from vendor's website.
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
- http://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