Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oracle | Supply Chain Products Suite | 6.1.2.2 |
| Oracle | Jd Edwards Enterpriseone Tools | 9.1 |
| Openssl | Openssl | 1.0.1n |
| Oracle | Opus 10G Ethernet Switch Family | <= 2.0.0.6 |
Related Weaknesses (CWE)
References
- http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chai
- 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.txtVendor Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20
- http://www.fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.htmlPatch
- 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
FAQ
What is CVE-2015-1793?
CVE-2015-1793 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 c...
How severe is CVE-2015-1793?
CVE-2015-1793 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-1793?
Check the references section above for vendor advisories and patch information. Affected products include: Oracle Supply Chain Products Suite, Oracle Jd Edwards Enterpriseone Tools, Openssl Openssl, Oracle Opus 10G Ethernet Switch Family.