Information disclosure in OpenSSH

1) Information disclosure

EUVDB-ID: #VU42080

Risk: Low

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

CVE-ID: CVE-2011-4327

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

ssh-keysign.c in ssh-keysign in OpenSSH before 5.8p2 on certain platforms executes ssh-rand-helper with unintended open file descriptors, which allows local users to obtain sensitive key information via the ptrace system call.

Mitigation

Install update from vendor's website.

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://www.openssh.com/txt/portable-keysign-rand-helper.adv
https://bugzilla.redhat.com/show_bug.cgi?id=755640

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.