Improper input validation in OpenSSL



| Updated: 2018-11-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2003-0851
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
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: #VU246

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2003-0851

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause OpenSSL to crash.

The vulnerability exists due to a large recursion that cannot be handled correctly. A remote unauthenticated attacker can cause OpenSSL to crash by sending arbitrary ASN.1 sequences.

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

Mitigation

Upgrade your version to OpenSSL 0.9.6l.

Vulnerable software versions

OpenSSL: 0.9.6k

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.



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