#VU244 Improper input validation in OpenSSL - CVE-2002-0659

Vulnerability identifier: #VU244

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2002-0659

CWE-ID: CWE-20

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 cause a denial of service.

The vulnerability exists due to a flaw in the ASN1 library. A remote unauthenticated attacker can cause a denial of service by sending invalid encodings.

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

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.