CVE-2021-27803

Publication date 26 February 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A vulnerability was discovered in how p2p/p2p_pd.c in wpa_supplicant before 2.10 processes P2P (Wi-Fi Direct) provision discovery requests. It could result in denial of service or other impact (potentially execution of arbitrary code), for an attacker within radio range.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
wpa	20.10 groovy	Fixed 2:2.9-1ubuntu8.2
	20.04 LTS focal	Fixed 2:2.9-1ubuntu4.3
	18.04 LTS bionic	Fixed 2:2.6-15ubuntu2.8
	16.04 LTS xenial	Fixed 2.4-0ubuntu6.8
	14.04 LTS trusty	Fixed 2.1-0ubuntu1.7+esm4

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
wpa	Upstream: src/p2p Upstream: https://w1.fi/security/2021-1/0001-P2P-Fix-a-corner-case-in-peer-addition-based-on-PD-R.patch

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Adjacent
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-4757-1
wpa_supplicant and hostapd vulnerability
3 March 2021

USN-4757-2
wpa_supplicant and hostapd vulnerability
4 March 2021