Bug 2016088 (CVE-2021-22926)

Summary:	CVE-2021-22926 curl: CURLOPT_SSLCERT mixup with Secure Transport
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amctagga, andrew.slice, anharris, bdettelb, bniver, bodavis, caswilli, csutherl, dbhole, dciabrin, fjansen, flucifre, gmeno, gzaronik, hhorak, hvyas, jburrell, jclere, jnakfour, jorton, jwong, jwon, kanderso, kaycoth, kdudka, krathod, luhliari, lvaleeva, mbayer, mbenjamin, mhackett, msekleta, mturk, omajid, paul, pjindal, psegedy, rwagner, saroy, sostapov, svashisht, szappis, vereddy, vkumar, vmugicag
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	curl 7.78.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-24 17:09:17 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:	2018078, 2018079, 2018080, 2018081
Bug Blocks:	2017825

Description Guilherme de Almeida Suckevicz 2021-10-20 18:38:26 UTC

libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.

Reference:
https://curl.se/docs/CVE-2021-22926.html

Comment 1 Guilherme de Almeida Suckevicz 2021-10-20 18:49:44 UTC

Created community-mysql tracking bugs for this issue:

Affects: fedora-all [bug 2016141]


Created mysql:8.0/community-mysql tracking bugs for this issue:

Affects: fedora-all [bug 2016142]

Comment 6 Product Security DevOps Team 2021-11-24 17:09:13 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-2021-22926