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CVE-2004-0079

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.

Severity
High 7.5
Published
23 Nov 2004
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
9.5% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Null pointer dereference (CWE-476)
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 0.9.7c
  • Version 0.9.7b
  • Version 0.9.7a
  • Version 0.9.7
All 16 release lines
  • Version 0.9.6c
  • Version 0.9.6d
  • Version 0.9.6e
  • Version 0.9.6f
  • Version 0.9.6g
  • Version 0.9.6h
  • Version 0.9.6i
  • Version 0.9.6j
  • Version 0.9.6k
  • Version 0.9.7-beta1
  • Version 0.9.7-beta2
  • Version 0.9.7-beta3
  • Version 0.9.7
  • Version 0.9.7a
  • Version 0.9.7b
  • Version 0.9.7c

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2004-0079
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2004-0079