SSLV2 Handshake malformed key buffer overflow in OpenSSL



Published: 2002-08-12 | Updated: 2018-09-14
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2002-0656
CWE-ID CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		OpenSSL
Server applications / Encryption software

Vendor OpenSSL Software Foundation

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) SSLV2 Handshake malformed key buffer overflow

EUVDB-ID: #VU245

Risk: Critical

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2002-0656

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

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: 0.9.6 - 0.9.6d

External links

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


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.



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