#VU59104 Out-of-bounds write in wpa_supplicant - CVE-2021-0326

Vulnerability identifier: #VU59104

Vulnerability risk: Medium

CVSSv4.0: 6.8 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-0326

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: Yes

Vulnerable software:
wpa_supplicant
Server applications / Encryption software

Vendor: Jouni Malinen

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the p2p_copy_client_info() function of p2p.c in wpa_suplicant. A remote attacker pass specially crafted input to the application, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

wpa_supplicant: 2.0 - 2.9

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External links
https://source.android.com/security/bulletin/2021-02-01
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMHPFCON6ZFCGZXSASJFKQ3UX2UIYMND/
https://lists.debian.org/debian-lts-announce/2021/02/msg00033.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VOSA6DZUDLVOCYJNNXD6V3MRBVLCXZFH/
https://www.debian.org/security/2021/dsa-4898

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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. However, proof of concept for this vulnerability is available.