CVE-2015-1793 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  6.5 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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 Vendor Advisory 
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 Patch 
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 Patch 
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html Patch 
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;a=commit;h=9a0db453ba017ebcaccbee933ee6511a9ae4d1c8 Vendor Advisory 
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
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351
https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes
https://kc.mcafee.com/corporate/index?page=content&id=SB10125
https://security.gentoo.org/glsa/201507-15
https://www.exploit-db.com/exploits/38640/
https://www.freebsd.org/security/advisories/FreeBSD-SA-15:12.openssl.asc

Weakness Enumeration

CWE-ID CWE Name Source
CWE-254 7PK - Security Features cwe source acceptance level NIST  

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Change History

29 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2015-1793
NVD Published Date:
07/09/2015
NVD Last Modified:
11/30/2018
Source:
MITRE