Input validation error in OpenSSH

1) Input validation error

EUVDB-ID: #VU44158

Risk: Low

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

CVE-ID: CVE-2011-5000

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows remote authenticated users to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (memory consumption) via a large value in a certain length field.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

OpenSSH: 1.2 - 5.7

CPE2.3

• cpe:2.3:a:openssh:openssh:1.2:*:*:*:*:*:*:*
• cpe:2.3:a:openssh:openssh:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:openssh:openssh:1.2.2:*:*:*:*:*:*:*

External links

https://rhn.redhat.com/errata/RHSA-2012-0884.html
https://seclists.org/fulldisclosure/2011/Aug/2
https://site.pi3.com.pl/adv/ssh_1.txt

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.