CVE-2015-1793

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 v3.0

6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v2.0

6.4 MEDIUMAV:N/AC:L/Au:N/C:P/I:P/A:N

EPSS

62.39% chance of exploitation in the next 30 days, 99th percentile

Published

2015-07-09

Updated

2024-08-06

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/auxiliary/server/openssl_altchainsforgery…

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/38640

References

• CVE Record
• NVD entry

Related

• CVE-2015-1792
• CVE-2015-1805
• CVE-2015-1791
• CVE-2015-1815
• CVE-2015-1790
• CVE-2015-1830