CVE-2011-5094

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

References

https://bugzilla.redhat.com/show_bug.cgi?id=707065

http://www.openwall.com/lists/oss-security/2011/07/08/2

http://www.ietf.org/mail-archive/web/tls/current/msg07577.html

http://www.ietf.org/mail-archive/web/tls/current/msg07576.html

http://www.ietf.org/mail-archive/web/tls/current/msg07567.html

http://www.ietf.org/mail-archive/web/tls/current/msg07564.html

http://www.ietf.org/mail-archive/web/tls/current/msg07553.html

http://www.educatedguesswork.org/2011/10/ssltls_and_computational_dos.html

http://vincent.bernat.im/en/blog/2011-ssl-dos-mitigation.html

http://orchilles.com/2011/03/ssl-renegotiation-dos.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3