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CVE-2011-5094

UnknownEPSS 2.71%

Last modified

CVE-2011-5094 is a vulnerability of currently unknown severity. 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. EPSS estimates a 2.71% chance of exploitation in the next 30 days.

Description

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

Metrics

EPSS Probability
2.71%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
MozillaNetwork Security Services3.2
MozillaNetwork Security Services3.2.1
MozillaNetwork Security Services3.3
MozillaNetwork Security Services3.3.1
MozillaNetwork Security Services3.3.2
MozillaNetwork Security Services3.4
MozillaNetwork Security Services3.4.1
MozillaNetwork Security Services3.4.2
MozillaNetwork Security Services3.5
MozillaNetwork Security Services3.6
MozillaNetwork Security Services3.6.1
MozillaNetwork Security Services3.7
MozillaNetwork Security Services3.7.1
MozillaNetwork Security Services3.7.2
MozillaNetwork Security Services3.7.3
MozillaNetwork Security Services3.7.5
MozillaNetwork Security Services3.7.7
MozillaNetwork Security Services3.8
MozillaNetwork Security Services3.9
MozillaNetwork Security Services3.11.2
MozillaNetwork Security Services3.11.3
MozillaNetwork Security Services3.11.4
MozillaNetwork Security Services3.11.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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
How severe is CVE-2011-5094?
Severity scoring for CVE-2011-5094 is pending analysis. The EPSS model estimates a 2.71% probability of exploitation in the next 30 days.
How do I fix CVE-2011-5094?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST