#VU245 SSLV2 Handshake malformed key buffer overflow in OpenSSL - CVE-2002-0656

Vulnerability identifier: #VU245

Vulnerability risk: Critical

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Red]

CVE-ID: CVE-2002-0656

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in OpenSSL. A remote unauthenticated attacker can execute arbitrary code by sending a large client master key in SSL2 or a large session ID in SSL3.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Upgrade your version to OpenSSL 0.9.6e.

Vulnerable software versions

OpenSSL: 0.9.6c - 0.9.6

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External links
https://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. However, proof of concept for this vulnerability is available.