CVE-2011-1473

Description

OpenSSL before 0.9.8l, and 0.9.8m through 1.x, 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-2011-5094. 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

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 91.84% Top 5%
Vendor Advisory marc.info
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://vincent.bernat.im/en/blog/2011-ssl-dos-mitigation.html
http://www.ietf.org/mail-archive/web/tls/current/msg07567.html mailing list
http://www.ietf.org/mail-archive/web/tls/current/msg07577.html mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=707065
http://archives.neohapsis.com/archives/bugtraq/2014-02/0061.html mailing list
http://www.educatedguesswork.org/2011/10/ssltls_and_computational_dos.html
http://www.openwall.com/lists/oss-security/2011/07/08/2 mailing list
http://marc.info/?l=bugtraq&m=133951357207000&w=2 vendor advisory
http://www.ietf.org/mail-archive/web/tls/current/msg07576.html mailing list
http://orchilles.com/2011/03/ssl-renegotiation-dos.html
http://www.ietf.org/mail-archive/web/tls/current/msg07553.html mailing list
http://www.ietf.org/mail-archive/web/tls/current/msg07564.html mailing list
https://lists.apache.org/thread.html/142b93d261e8ac7c5ceffdce848d622404abc1c286bbc999f43a9e10%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/6121becfdd23f9aeb675d5db80616536277d5931d6cde9dca292e509%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/8be38d35654441140db8eb3f7433524b3653ac3fdc26e2fa94626a3a%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r1e33410bb5c81536e7fe14b51fa83e7bfd9445db61fd10c134792bde%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r298a09a2b98446b27217d719e877c643b6d13fac0bcafe04696a446b%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r77fe575893261889b983e067293be72fa1f8c6305ede9fdbc404c514%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r5e595b91f00613dafa635852121d45b161e8b5c3eba4551aeccc6483%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r3822ad69442291562c2ab41132fc49780d269e8b52deb458b7060f6d%40%3Ccommits.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r8680f41bcdad13c3f267cb868b45e5fb1f57df8b39d25193f7d66500%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/ra95c355827b3c96c8013ed8e0666c851581651be2524f3d28cd4fe71%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/r13a07a09f98b2841193dbf17a47c7f09b464e0747a1d3e7298ad4c81%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/rf9e8ae0356af3ec4f7780ca651b770721d287d4d55f62f4f754e0a6f%40%3Cdev.rocketmq.apache.org%3E mailing list
https://lists.apache.org/thread.html/rc98eaa3f8223ac75aa5969f717954d8cbc9f3a9d8b7a6156a54fa557%40%3Cdev.rocketmq.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2011-1473?
CVE-2011-1473 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1473?
To fix CVE-2011-1473, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1473 being actively exploited in the wild?
It is possible that CVE-2011-1473 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~92% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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