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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...

7.5 HighFix available

CVE-2004-0079 is a high vulnerability (CVSS 7.5) in Openssl, published March 17, 2004. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 9.54%, the 95th percentile. Fixed in openssl 0.9.7d-1.

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

9.54%Up 2.0 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2004-0079
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-476
Updated
2026-11-02
CVE List 7.5

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.

Record
CVE-2004-0079
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2004-0079 7.5

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.

Record
EUVD-2004-0079
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-xcj5-xcx2-vvvv No score

The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows...

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.

Record
GHSA-xcj5-xcx2-vvvv
Updated
2026-11-02
OSV 7.5

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.

Record
CVE-2004-0079
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2004-0079 7.5

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.

Record
DEBIAN-CVE-2004-0079
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

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Affected packages

Affected packages
PackageAffectedFixed
openssl
Debian:12
 before 0.9.7d-1
0.9.7d-1
openssl
Debian:13
 before 0.9.7d-1
0.9.7d-1
openssl
Debian:14
 before 0.9.7d-1
0.9.7d-1
openssl
Debian:3.0
 before 0.9.6c-2.woody.6
0.9.6c-2.woody.6
openssl094
Debian:3.0
 before 0.9.4-6.woody.4, plus listed versions
0.9.4-60.9.4-6.potato.30.9.4-6.woody.3
0.9.4-6.woody.4
openssl095
Debian:3.0
 before 0.9.5a-6.woody.5, plus listed versions
0.9.5a-6.woody.3
0.9.5a-6.woody.5
openssl
Red Hat:enterprise_linux:3::as
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-devel
Red Hat:enterprise_linux:3::as
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-perl
Red Hat:enterprise_linux:3::as
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
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Affected packages
PackageAffectedFixed
openssl096b
Red Hat:enterprise_linux:3::as
 before 0:0.9.6b-16
0:0.9.6b-16
openssl096b-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:0.9.6b-16
0:0.9.6b-16
openssl
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-devel
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-perl
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl096b
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.6b-16
0:0.9.6b-16
openssl096b-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:0.9.6b-16
0:0.9.6b-16
openssl
Red Hat:enterprise_linux:3::es
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-devel
Red Hat:enterprise_linux:3::es
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-perl
Red Hat:enterprise_linux:3::es
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl096b
Red Hat:enterprise_linux:3::es
 before 0:0.9.6b-16
0:0.9.6b-16
openssl096b-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:0.9.6b-16
0:0.9.6b-16
openssl
Red Hat:enterprise_linux:3::ws
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-devel
Red Hat:enterprise_linux:3::ws
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl-perl
Red Hat:enterprise_linux:3::ws
 before 0:0.9.7a-33.4
0:0.9.7a-33.4
openssl096b
Red Hat:enterprise_linux:3::ws
 before 0:0.9.6b-16
0:0.9.6b-16
openssl096b-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:0.9.6b-16
0:0.9.6b-16

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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