Improper input validation in OpenSSL



| Updated: 2018-11-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2002-0659
CWE-ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 OpenSSL
Server applications / Encryption software

Vendor OpenSSL Software Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU244

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 - Improper input validation

Exploit availability: Yes

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

CPE2.3 External links

https://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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