Vulnerability identifier: #VU260

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2004-0079

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description
The vulnerability allows a remote attacker to denial of service.

The vulnerability exists due to the do_change_cipher_spec function in OpenSSL. A remote unauthenticated attacker can cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference.

Successful exploitation of this vulnerability may result in denial of service.

Mitigation
Upgrate your version to OpenSSL 0.9.6m, OpenSSL 0.9.7d.

Vulnerable software versions

OpenSSL: 0.9.7 - 0.9.7c, 0.9.6 - 0.9.6l

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External links
http://www.openssl.org/news/vulnerabilities.html#y2002

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.