Buffer overflow in OpenSSH

1) Buffer overflow

EUVDB-ID: #VU40510

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-1907

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via crafted network traffic.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenSSH: 6.8 - 7.1

CPE2.3

• cpe:2.3:a:openssh:openssh:6.8:*:*:*:*:*:*:*
• cpe:2.3:a:openssh:openssh:6.9:*:*:*:*:*:*:*
• cpe:2.3:a:openssh:openssh:7.0:*:*:*:*:*:*:*

External links

https://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.html
https://www.openssh.com/txt/release-7.1p2
https://www.securityfocus.com/bid/81293
https://anongit.mindrot.org/openssh.git/commit/?id=2fecfd486bdba9f51b3a789277bb0733ca36e1c0
https://bto.bluecoat.com/security-advisory/sa109
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722

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.