What’s Vulnerable › Vulnerabilities

CVE-2015-1788

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 20.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-06-12 · updated 2026-06-17
• Weakness: CWE-399

Description

The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial field, which allows remote attackers to cause a denial of service (infinite loop) via a session that uses an Elliptic Curve algorithm, as demonstrated by an attack against a server that supports client authentication.

Affected products

• OpenSSL: through 0.9.8zf; 1.0.0, 1.0.0-beta1, 1.0.0-beta2, 1.0.0-beta3, 1.0.0-beta4, 1.0.0-beta5 (+38)

References

• http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
• http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015
• 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.apple.com/archives/security-announce/2015/Aug/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html
• http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html

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