CVE-2015-1788

Medium

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.

SeverityMedium
CVSS4.3
Exploit probability—
ProductOpenssl
PublishedJun 12, 2015
First seenJun 12, 2015

How to fix

Affected products

ProductAffected versionsFixed in
openssl opensslv ≤ 0.9.8zf, 1.0.0, 1.0.0a, 1.0.0b, 1.0.0c, 1.0.0d, 1.0.0e, 1.0.0f, 1.0.0g, 1.0.0h, 1.0.0i, 1.0.0j, 1.0.0k, 1.0.0l, 1.0.0m, 1.0.0n, 1.0.0o, 1.0.0p, 1.0.0q, 1.0.0r, 1.0.1, 1.0.1a, 1.0.1b, 1.0.1c, 1.0.1d, 1.0.1e, 1.0.1f, 1.0.1g, 1.0.1h, 1.0.1i, 1.0.1j, 1.0.1k, 1.0.1l, 1.0.1m, 1.0.2, 1.0.2a—

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CVE-2015-1788 · Openssl · Dark Radar