Bug 1997467 (CVE-2021-3764)

Summary:	CVE-2021-3764 kernel: DoS in ccp_run_aes_gcm_cmd() function
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jeremy, jforbes, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, security-response-team, steved, vdronov, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Linux kernel 4.12-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A memory leak flaw was found in the Linux kernel's ccp_run_aes_gcm_cmd() function that allows an attacker to cause a denial of service. The vulnerability is similar to the older CVE-2019-18808. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-11 09:16:32 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1997591, 1997592, 1997593, 1997594, 1997595
Bug Blocks:	1996557

Description Alex 2021-08-25 09:59:08 UTC

A memory leak in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel allows attackers to cause a denial of service (memory consumption).
It happens if function ccp_init_data(&src) returns error code (that is being called from the ccp_run_aes_gcm_cmd).
This vulnerability is similar with the older CVE-2019-18808 and both with the CVE-2021-3744 (and the patch for the CVE-2021-3744 contains fix for this one too).

Reference:
TODO: add link to the patch when available

Comment 11 Vladis Dronov 2021-11-09 11:11:31 UTC

the fixing upstream commit is present since v5.15-rc4 and is:
505d9dcb0f7d ("crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd()")

Comment 12 errata-xmlrpc 2022-05-10 14:39:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975

Comment 13 errata-xmlrpc 2022-05-10 14:45:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988

Comment 14 Product Security DevOps Team 2022-05-11 09:16:29 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3764