CVE-2015-1793
Description
The X509_verify_cert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Metasploit modules
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1.0.2d-1 |
| debian | bullseye | fixed | 1.0.2d-1 |
| debian | forky | fixed | 1.0.2d-1 |
| debian | sid | fixed | 1.0.2d-1 |
| debian | trixie | fixed | 1.0.2d-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| oracle | supply_chain_products_suite | 6.1.2.2 | |
| oracle | supply_chain_products_suite | 6.1.3.0 | |
| oracle | supply_chain_products_suite | 6.2.0 | |
| oracle | jd_edwards_enterpriseone_tools | 9.1 | |
| oracle | jd_edwards_enterpriseone_tools | 9.2 | |
| openssl | openssl | 1.0.1n | |
| openssl | openssl | 1.0.1o | |
| openssl | openssl | 1.0.2b | |
| openssl | openssl | 1.0.2c | |
References
- http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
- http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161747.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161782.html
- http://marc.info/?l=bugtraq&m=143880121627664&w=2
- http://marc.info/?l=bugtraq&m=144370846326989&w=2
- http://openssl.org/news/secadv_20150709.txt
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150710-openssl
- http://www.fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://www.securityfocus.com/bid/75652
- http://www.securityfocus.com/bid/91787
- http://www.securitytracker.com/id/1032817
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.561427
- http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-454058.htm
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=9a0db453ba017ebcaccbee933ee6511a9ae4d1c8
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04822825
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763
CWEs
CWE-254
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.