CVE-2011-1473
What it is
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
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Exploit odds
- 66.9% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- No patch or advisory is linked yet. Look at mitigations or restrict exposure.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 66.9% in the next 30 days (EPSS).
- Severity: 5.0 MEDIUM (CVSS).
- Fix: none linked yet, which raises it.
Details
- Published
- Last modified
- Exploit probability
- 66.9% · EPSS, next 30 days
- Weakness
- CWE-264
- Record status
- Modified
Affected
- OpenSSL 0.9.8m
- OpenSSL 0.9.8n
- OpenSSL 0.9.8o
- OpenSSL 0.9.8p
- OpenSSL 0.9.8r
- OpenSSL 0.9.8s
- OpenSSL 0.9.8t
- OpenSSL 0.9.8u
Attack profile CVSS 2.0 · 5.0
- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
Raw vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2011-1473.md and follow it. Check whether this project is affected by CVE-2011-1473. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
References
- http://archives.neohapsis.com/archives/bugtraq/2014-02/0061.html
- http://marc.info/?l=bugtraq&m=133951357207000&w=2
- http://orchilles.com/2011/03/ssl-renegotiation-dos.html
- http://vincent.bernat.im/en/blog/2011-ssl-dos-mitigation.html
- http://www.educatedguesswork.org/2011/10/ssltls_and_computational_dos.html
- http://www.ietf.org/mail-archive/web/tls/current/msg07553.html
- http://www.ietf.org/mail-archive/web/tls/current/msg07564.html
- http://www.ietf.org/mail-archive/web/tls/current/msg07567.html
- http://www.ietf.org/mail-archive/web/tls/current/msg07576.html
- http://www.ietf.org/mail-archive/web/tls/current/msg07577.html
- http://www.openwall.com/lists/oss-security/2011/07/08/2
- https://bugzilla.redhat.com/show_bug.cgi?id=707065
- https://lists.apache.org/thread.html/142b93d261e8ac7c5ceffdce848d622404abc1c286bbc999f43a9e10%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/6121becfdd23f9aeb675d5db80616536277d5931d6cde9dca292e509%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/8be38d35654441140db8eb3f7433524b3653ac3fdc26e2fa94626a3a%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r13a07a09f98b2841193dbf17a47c7f09b464e0747a1d3e7298ad4c81%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r1e33410bb5c81536e7fe14b51fa83e7bfd9445db61fd10c134792bde%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r298a09a2b98446b27217d719e877c643b6d13fac0bcafe04696a446b%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r3822ad69442291562c2ab41132fc49780d269e8b52deb458b7060f6d%40%3Ccommits.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r5e595b91f00613dafa635852121d45b161e8b5c3eba4551aeccc6483%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r77fe575893261889b983e067293be72fa1f8c6305ede9fdbc404c514%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/r8680f41bcdad13c3f267cb868b45e5fb1f57df8b39d25193f7d66500%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/ra95c355827b3c96c8013ed8e0666c851581651be2524f3d28cd4fe71%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/rc98eaa3f8223ac75aa5969f717954d8cbc9f3a9d8b7a6156a54fa557%40%3Cdev.rocketmq.apache.org%3E
- https://lists.apache.org/thread.html/rf9e8ae0356af3ec4f7780ca651b770721d287d4d55f62f4f754e0a6f%40%3Cdev.rocketmq.apache.org%3E