Vulnerability · 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 t
Published Nov 23, 2004 · catalog updated Oct 21, 2026 · The do_change_cipher_spec function in
Check if you run it
No confirmed exploitation is on record for CVE-2004-0079. EPSS is 9.54%. Act only if a listed version of The do_change_cipher_spec function in is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (The do_change_cipher_spec function in).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 9.54%
- Remediation
- Advisory link
- Affected products
- Debian:12 openssl · Debian:13 openssl · Debian:14 openssl
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- Debian:12 openssl0 → 0.9.7d-1
- Debian:13 openssl0 → 0.9.7d-1
- Debian:14 openssl0 → 0.9.7d-1
How to fix CVE-2004-0079
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2004-0079. EPSS is 9.54%. Act only if a listed version of The do_change_cipher_spec function in is installed.
Which versions are affected?
Compare what you have installed with 0 → 0.9.7d-1. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 9.54%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Nov 23, 2004 · OpenSSF OSV / OSV Scanner
Detected
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.
Oct 21, 2026 · OpenSSF OSV / OSV Scanner
Fix available
openssl fixed in 0.9.7d-1; openssl fixed in 0.9.7d-1; openssl fixed in 0.9.7d-1
Oct 21, 2026 · OpenSSF OSV / OSV Scanner
Fix available
openssl fixed in 0.9.7d-1
Oct 21, 2026 · OpenSSF OSV / OSV Scanner
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2004-0079
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2004-0079
30-day exploitation probability 9.54%
first.org - OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2004-0079osv.dev
References
Freshness
Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.