#VU55968 Resource management error in wpa_supplicant - CVE-2021-27803
Vulnerability identifier: #VU55968
Vulnerability 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:
CWE-ID:
CWE-399
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
wpa_supplicant
Server applications /
Encryption software
Vendor: 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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
wpa_supplicant: 0.2 - 2.9
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.
