CVE-2015-2721

Impact:
Moderate
Public Date:
2015-07-02
CWE:
CWE-358
Bugzilla:
1236967: CVE-2015-2721 NSS: incorrectly permited skipping of ServerKeyExchange (MFSA 2015-71)
It was found that NSS permitted skipping of the ServerKeyExchange packet during a handshake involving ECDHE (Elliptic Curve Diffie-Hellman key Exchange). A remote attacker could use this flaw to bypass the forward-secrecy of a TLS/SSL connection.

Find out more about CVE-2015-2721 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 5.1
Base Metrics AV:N/AC:H/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 5 (nss) RHSA-2015:1664 2015-08-24
Red Hat Enterprise Linux 6 (nss) RHSA-2015:1185 2015-06-25
Red Hat Enterprise Linux 7 (nss) RHSA-2015:1185 2015-06-25

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 openssl Not affected
Red Hat Enterprise Linux 7 gnutls Not affected
Red Hat Enterprise Linux 6 openssl Not affected
Red Hat Enterprise Linux 6 gnutls Not affected
Red Hat Enterprise Linux 5 openssl Not affected
Red Hat Enterprise Linux 5 gnutls Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Karthikeyan Bhargavan as the original reporter.

External References

Last Modified