Debian update for openssh

1) Null pointer dereference

EUVDB-ID: #VU14163

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-10708

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to improper processing of out-of-sequence NEWKEYS messages, as defined in the kex.c and packet.c source code files. A remote attacker can send an out-of-sequence NEWKEYS message, trigger a NULL pointer dereference condition and cause the sshd daemon to crash.

Mitigation

Update your openssh package to version 1:7.9p1-1, 1:6.7p1-5+deb8u6 or 1:6.0p1-4+deb7u7.

Vulnerable software versions

openssh (Debian package): 1:6.0p1-4+deb7u1 - 1:6.7p1-6

CPE2.3

• cpe:2.3:a:debian:openssh_debian_package:1:6.0p1-4 deb7u1:*:*:*:*:debian_linux:*:*
• cpe:2.3:a:debian:openssh_debian_package:1:6.0p1-4 deb7u2:*:*:*:*:debian_linux:*:*
• cpe:2.3:a:debian:openssh_debian_package:1:6.0p1-4 deb7u3:*:*:*:*:debian_linux:*:*

External links

https://security-tracker.debian.org/tracker/CVE-2016-10708

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.