What is CVE-2009-3555?

CVE-2009-3555 is a critical-severity vulnerability in Apache Http_server, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2009-11-09.

How severe is CVE-2009-3555?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2009-3555 known to be exploited?

40 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apache Http_server

CVE-2009-3555

The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla N…

Vulnerability class: Improper Certificate Validation

EPSS: 0.037 (88.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Http_server
F5 Nginx
Gnu Gnutls
Mozilla Nss
Openssl — versions 1.0
Canonical Ubuntu_linux — versions 8.04, 8.10, 9.04
Debian Debian_linux — versions 4.0, 5.0, 6.0
Fedoraproject Fedora — versions 11, 12, 13
N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

secalert@redhat.com (vendor-advisory, x_refsource_APPLE, Mailing List, Third Party Advisory)
secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
secalert@redhat.com (x_refsource_OSVDB, vdb-entry, Broken Link)
secalert@redhat.com (x_refsource_SECUNIA, Third Party Advisory, third-party-advisory)
secalert@redhat.com (x_refsource_CONFIRM, Broken Link)
secalert@redhat.com (Third Party Advisory, vdb-entry, x_refsource_VUPEN)
secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (Third Party Advisory, vdb-entry, x_refsource_VUPEN)

Frequently asked questions

What is CVE-2009-3555?: CVE-2009-3555 is a critical-severity vulnerability in Apache Http_server, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2009-11-09.
How severe is CVE-2009-3555?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2009-3555 known to be exploited?: 40 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.