CVE-2015-2721
Medium
Description
Mozilla Network Security Services (NSS) before 3.19, as used in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, Thunderbird before 38.1, and other products, does not properly determine state transitions for the TLS state machine, which allows man-in-the-middle attackers to defeat cryptographic protection mechanisms by blocking messages, as demonstrated by removing a forward-secrecy property by blocking a ServerKeyExchange message, aka a "SMACK SKIP-TLS" issue.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mozilla Network Security Services
PublishedJul 6, 2015
First seenJul 6, 2015
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla network_security_services | 3.19 | — |
| novell suse_linux_enterprise_software_development_kit | 12.0 | — |
| canonical ubuntu_linux | 12.04, 14.04, 14.10, 15.04 | — |
| debian debian_linux | 7.0, 8.0 | — |
| novell suse_linux_enterprise_desktop | 12.0 | — |
| novell suse_linux_enterprise_server | 11, 12.0 | — |
| oracle solaris | 11.3 | — |
| oracle vm_server | 3.2 | — |
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