CVE-2015-1789: OpenSSL

High severity, CVSS 7.5. EPSS: 75.6% chance of exploitation in the next 30 days.

The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.

Affected products

• OpenSSL OpenSSL: up to and including 0.9.8zf; version 1.0.0 only; version 1.0.0a only; version 1.0.0b only; version 1.0.0c only; version 1.0.0d only; …
• Oracle Sparc-Opl Service Processor: up to and including 1121

Published 2015-06-12. Last modified 2026-06-17.