CVE-2013-1620: The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-ch...

Security readout for executives and security teams

CVE-2013-1620 is a weakness in Mozilla NSS TLS handling for CBC-mode encrypted sessions. A remote attacker could use many timing observations from malformed TLS traffic to distinguish responses and potentially recover plaintext. The bundle does not show active exploitation or a single affected-version list. Most likely exposure is legacy or unpatched systems using Mozilla NSS for TLS, especially internet-facing services that still negotiate CBC cipher suites. The source bundle lists multiple vendor advisories but does not provide complete affected products or versions. Treat this as legacy crypto debt with real confidentiality implications, not as an emergency without exposure evidence. Prioritize if NSS-backed TLS services are public-facing, old, or protecting sensitive sessions. Mitigation focus: Identify systems and products that use Mozilla NSS for TLS.; Apply vendor-supported updates from relevant advisories.; Prioritize internet-facing TLS services and sensitive data paths..

Prepared

Jun 24, 2026, 11:46 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.