CVE Catalog

CVE-2015-7575

MediumCVSS 5.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

High risk
2.90%

87th percentile - higher than 87% of all known CVEs

Summary

Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision.

Risk Assessment

A man-in-the-middle attacker can spoof a server and intercept or modify communication.

Recommendation

Update Mozilla Firefox, Firefox ESR, and NSS to versions containing the fixes.

Related vulnerabilities

Original NVD description (English source)

Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS