Servers and applications
CVE-2011-1473
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…
- Severity
- Medium 5.0
- Published
- 16 Jun 2012
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 21 Oct 2026
- Exploit chance
- 67% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
- Weakness
- CWE-264
- Attack
- Over the network · No login needed
- Attacker can
- Slow it down
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Sources
- NVD
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
Affected software
| Software | Affected versions |
|---|---|
OpenSSLServers and applications · cpe:a:openssl:openssl |
All 13 release lines
|