Bug 2139104 (CVE-2022-3786)

Summary: CVE-2022-3786 OpenSSL: X.509 Email Address Variable Length Buffer Overflow
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abrianik, adudiak, arachman, asoldano, bbaranow, bdettelb, berrange, bihu, bmaxwell, bootloader-eng-team, brian.stansberry, caswilli, cdewolf, chazlett, cllang, csutherl, darran.lofthouse, dbelyavs, ddepaula, dffrench, dhalasz, dkreling, dkuc, dosoudil, drieden, fdupont, fjansen, fjuma, gparvin, gzaronik, hbraun, ikanias, iweiss, jary, jburrell, jclere, jferlan, jkoehler, jwong, jwon, kaycoth, kraxel, kshier, lgao, lveyde, michal.skrivanek, micjohns, mmadzin, mosmerov, mperina, mresvani, msochure, msvehla, mturk, ngough, njean, nwallace, nweather, owatkins, pahickey, pbonzini, peholase, pjindal, plodge, pmackay, rgodfrey, rh-spice-bugs, rravi, rstancel, sbonazzo, security-response-team, smaestri, stcannon, sthirugn, szappis, teagle, tfister, tohughes, tom.jenkinson, virt-maint, vkrizan, vkumar, vmugicag
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: openssl 3.0.7 Doc Type: If docs needed, set a value
Doc Text:
A stack-based buffer overflow was found in the way OpenSSL processes X.509 certificates with a specially crafted email address field. This issue could cause a server or a client application compiled with OpenSSL to crash or possibly execute remote code when trying to process the malicious certificate.
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-11-10 11:13:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 2139105, 2139106, 2139107, 2139151, 2139152    
Bug Blocks: 2137628    

Description Guilherme de Almeida Suckevicz 2022-11-01 13:31:55 UTC
As per upstream report:

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service).

In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

OpenSSL versions 3.0.0 to 3.0.6 are vulnerable to this issue.

OpenSSL 3.0 users should upgrade to OpenSSL 3.0.7.

OpenSSL 1.1.1 and 1.0.2 are not affected by this issue.

Comment 2 Sandipan Roy 2022-11-01 16:11:34 UTC
The flaw is Public Now, Lifting Embargoed.

Comment 3 Sandipan Roy 2022-11-01 16:12:16 UTC
Created openssl tracking bugs for this issue:

Affects: fedora-all [bug 2139151]

Created openssl3 tracking bugs for this issue:

Affects: epel-all [bug 2139152]

Comment 5 errata-xmlrpc 2022-11-01 18:35:01 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:7288 https://access.redhat.com/errata/RHSA-2022:7288

Comment 10 errata-xmlrpc 2022-11-03 13:04:48 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:7384 https://access.redhat.com/errata/RHSA-2022:7384