CVE-2020-29363

Publication date 16 December 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in p11-kit 0.23.6 through 0.23.21. A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
p11-kit	21.04 hirsute	Fixed 0.23.22-1
	20.10 groovy	Fixed 0.23.21-2ubuntu0.1
	20.04 LTS focal	Fixed 0.23.20-1ubuntu0.1
	18.04 LTS bionic	Fixed 0.23.9-2ubuntu0.1
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Patch details

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

Package	Patch details
p11-kit	Upstream: 2617f3e

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-4677-1
p11-kit vulnerabilities
5 January 2021