Which products and versions are affected by CVE-2011-1473?

Affected: Openssl versions 0.9.8m, 0.9.8m-beta1, 0.9.8n, 0.9.8o, 0.9.8p, 0.9.8r, 0.9.8s, 0.9.8t; seal-openssl. The full list is in the CVE brief.

Is CVE-2011-1473 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2011-1473 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2011-1473?

No public exploit code is known.

Is there a fix for CVE-2011-1473?

Fixed versions are available, including Openssl 1:1.0.2k-25.el7_9+sp999, Openssl 1.0.1e-59.el6_10+sp999, Openssl 0.9.8k.

How urgently should CVE-2011-1473 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2011-1473

Medium

openssl: DoS via repeated SSL session renegotiations

Published Mar 13, 2011 · Updated Aug 6, 2024

Key Facts

Patch immediately

CVE-2011-1473 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Openssl, seal-openssl.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 67% probability of exploitation in the next 30 days.
Fixed versions are available, including Openssl 1:1.0.2k-25.el7_9+sp999, Openssl 1.0.1e-59.el6_10+sp999, Openssl 0.9.8k.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

5.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS (30-day exploit likelihood)

67%

Higher than 99.2% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2011-1473 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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 Products

17 affected entries in total

Product	Affected versions	Fixed in
OpensslOpenssl	0.9.8m, 0.9.8m-beta1, 0.9.8n, 0.9.8o, 0.9.8p, 0.9.8r, 0.9.8s, 0.9.8t	0.9.8k
seal-opensslseal	See advisory	1.0.1e-59.el6_10+sp999

Patched Releases

Openssl

1:1.0.2k-25.el7_9+sp999, 1.0.1e-59.el6_10+sp999, 0.9.8k

seal-openssl

1:1.0.2k-25.el7_9+sp999, 1.0.1e-59.el6_10+sp999

Timeline

Publicly disclosed
Mar 13, 2011
Last updated
Aug 6, 2024

Weakness Type

CWE-264

References

15 more references in the full CVE brief

FAQ

Common Questions.

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 vulnerabili…
Affected: Openssl versions 0.9.8m, 0.9.8m-beta1, 0.9.8n, 0.9.8o, 0.9.8p, 0.9.8r, 0.9.8s, 0.9.8t; seal-openssl. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Openssl 1:1.0.2k-25.el7_9+sp999, Openssl 1.0.1e-59.el6_10+sp999, Openssl 0.9.8k.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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