CVE-2011-5094

Mozilla Network Security Services (NSS) 3.x, with certain settings of the SSL_ENABLE_RENEGOTIATION option, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection, a different vulnerability than CVE-2011-1473. NOTE: it can also be argued that it is the responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment

Published: 2012-06-16 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5094 is rated Moderate Risk (46.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.71%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-5094

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.97% 2.71% -0.27%
2 2026-06-10 3.44% 2.97% -0.47%
3 2026-03-26 — 3.44% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5094

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-5094

OS Trackers for CVE-2011-5094

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2011-5094
ubuntu low CVE-2011-5094 low priority: Ubuntu including 1 source packages (nss), 6 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): ignored 5, needs-triage 1. https://ubuntu.com/security/CVE-2011-5094

Affected software / configurations for CVE-2011-5094

Vendor Product Version Raw CPE
mozilla network_security_services 3.2 cpe:2.3:a:mozilla:network_security_services:3.2:*:*:*:*:*:*:*
mozilla network_security_services 3.2.1 cpe:2.3:a:mozilla:network_security_services:3.2.1:*:*:*:*:*:*:*
mozilla network_security_services 3.3 cpe:2.3:a:mozilla:network_security_services:3.3:*:*:*:*:*:*:*
mozilla network_security_services 3.3.1 cpe:2.3:a:mozilla:network_security_services:3.3.1:*:*:*:*:*:*:*
mozilla network_security_services 3.3.2 cpe:2.3:a:mozilla:network_security_services:3.3.2:*:*:*:*:*:*:*
mozilla network_security_services 3.4 cpe:2.3:a:mozilla:network_security_services:3.4:*:*:*:*:*:*:*
mozilla network_security_services 3.4.1 cpe:2.3:a:mozilla:network_security_services:3.4.1:*:*:*:*:*:*:*
mozilla network_security_services 3.4.2 cpe:2.3:a:mozilla:network_security_services:3.4.2:*:*:*:*:*:*:*
mozilla network_security_services 3.5 cpe:2.3:a:mozilla:network_security_services:3.5:*:*:*:*:*:*:*
mozilla network_security_services 3.6 cpe:2.3:a:mozilla:network_security_services:3.6:*:*:*:*:*:*:*
mozilla network_security_services 3.6.1 cpe:2.3:a:mozilla:network_security_services:3.6.1:*:*:*:*:*:*:*
mozilla network_security_services 3.7 cpe:2.3:a:mozilla:network_security_services:3.7:*:*:*:*:*:*:*
mozilla network_security_services 3.7.1 cpe:2.3:a:mozilla:network_security_services:3.7.1:*:*:*:*:*:*:*
mozilla network_security_services 3.7.2 cpe:2.3:a:mozilla:network_security_services:3.7.2:*:*:*:*:*:*:*
mozilla network_security_services 3.7.3 cpe:2.3:a:mozilla:network_security_services:3.7.3:*:*:*:*:*:*:*
mozilla network_security_services 3.7.5 cpe:2.3:a:mozilla:network_security_services:3.7.5:*:*:*:*:*:*:*
mozilla network_security_services 3.7.7 cpe:2.3:a:mozilla:network_security_services:3.7.7:*:*:*:*:*:*:*
mozilla network_security_services 3.8 cpe:2.3:a:mozilla:network_security_services:3.8:*:*:*:*:*:*:*
mozilla network_security_services 3.9 cpe:2.3:a:mozilla:network_security_services:3.9:*:*:*:*:*:*:*
mozilla network_security_services 3.11.2 cpe:2.3:a:mozilla:network_security_services:3.11.2:*:*:*:*:*:*:*
mozilla network_security_services 3.11.3 cpe:2.3:a:mozilla:network_security_services:3.11.3:*:*:*:*:*:*:*
mozilla network_security_services 3.11.4 cpe:2.3:a:mozilla:network_security_services:3.11.4:*:*:*:*:*:*:*
mozilla network_security_services 3.11.5 cpe:2.3:a:mozilla:network_security_services:3.11.5:*:*:*:*:*:*:*

References for CVE-2011-5094

cvelogic Threat Intelligence