CVE-2015-1793

CVE-2015-1793

Published · Updated

50Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendepss 58%
from disclosure to weapon119 days
Published on NVDJul 9
1st PoC+119d
metasploitJul 9
exploitation probability
58%top 1% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Not affected
7 products (21 components) — because the vulnerable code is not present in the product
Red Hat Enterprise Linux 7 · Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 5 · Red Hat Enterprise Linux 4 · Red Hat JBoss Enterprise Application Platform 6 · and others 2
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.
Affected products
n/a · n/a
public PoCs found — 2
exploitdbwww.exploit-db.com/exploits/38640unverifiedcve_referencewww.exploit-db.com/exploits/38640/unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgeryhttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.aschttp://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161747.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2015-July/161782.htmlhttp://marc.info/?l=bugtraq&m=143880121627664&w=2http://marc.info/?l=bugtraq&m=144370846326989&w=2http://openssl.org/news/secadv_20150709.txthttps://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=9a0db453ba017ebcaccbee933ee6511a9ae4d1c8https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04822825https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351