Vulnerability in OpenSSL

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 responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment

Published · last modified .

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.672 (99.3th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2011-1473: held from 0.672 to 0.672.

EPSS over last 30 days · oldest: 0.672 · newest: 0.672 · change: 0.000

Affected products

  • OpenSSL — versions 0.9.8m, 0.9.8n, 0.9.8o

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2011-1473?
CVE-2011-1473 is a vulnerability in OpenSSL, classified under CWE-264. Published 2012-06-16.
Is CVE-2011-1473 known to be exploited?
35 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.