#VU100 Buffer overflow when handling ASCII characters in OpenSSL - CVE-2002-0655

Vulnerability identifier: #VU100

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2002-0655

CWE-ID: CWE-119

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 execute arbitrary code on the target system.

The vulnerability exists due to improper handling of ASCII representations of integers on 64-bit platforms. A remote unauthenticated attacker can cause a denial of service or possible arbitrary code execution.

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

Mitigation
Apply the attached patch to OpenSSL 0.9.6d, or upgrade to OpenSSL 0.9.6e.
A patch for 0.9.7 is available from the OpenSSL website:

https://www.openssl.org/

Vulnerable software versions

OpenSSL: 0.9.6d - 0.9.6

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External links
https://www.openssl.org/news/secadv/20020730.

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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.