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Fencer Vulns
high 7.5

CVE-2004-0079 json

The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service…

published 2004-03-18 22 y ago modified 2026-06-16 4 mo ago also EUVD-2004-0079

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
9.5%
EPSS 9.5% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 0.9.7d-1

debian advisories DEBIAN-CVE-2004-0079

  • openssl RHEL 3 0.9.7a-33.4
  • openssl096b RHEL 3 0.9.6b-16
  • openssl-perl RHEL 3 0.9.7a-33.4

red hat advisories RHSA-2004:120

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2004-0079 updated

security flaw

  • Red Hat Desktop version 3 openssl 0.9.7a-33.4, openssl096b 0.9.6b-16, openssl-perl 0.9.7a-33.4, openssl096b 0.9.6b-16.42 Red Hat Enterprise Linux AS version 3 openssl 0.9.7a-33.4, openssl096b 0.9.6b-16, openssl-perl 0.9.7a-33.4, openssl096b 0.9.6b-16.42
    fixed: vendor fix RHSA-2004:120
  • Red Hat Enterprise Linux AS version 4 openssl096b 0.9.6b-22.42 Red Hat Enterprise Linux Desktop version 4 openssl096b 0.9.6b-22.42
    fixed: vendor fix RHSA-2005:830
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2005:829
  • Red Hat Enterprise Linux ES version 3 openssl 0.9.7a-33.4, openssl096b 0.9.6b-16, openssl-perl 0.9.7a-33.4, openssl096b 0.9.6b-16.42
    fixed: vendor fix RHSA-2004:120
  • Red Hat Enterprise Linux ES version 4 openssl096b 0.9.6b-22.42
    fixed: vendor fix RHSA-2005:830
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2005:829
  • Red Hat Enterprise Linux WS version 3 openssl 0.9.7a-33.4, openssl096b 0.9.6b-16, openssl-perl 0.9.7a-33.4, openssl096b 0.9.6b-16.42
    fixed: vendor fix RHSA-2004:120
  • Red Hat Enterprise Linux WS version 4 openssl096b 0.9.6b-22.42
    fixed: vendor fix RHSA-2005:830
show 3 more

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

9.54% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.