Remote code execution in Elttam GoAhead

1) Remote code execution

EUVDB-ID: #VU9817

Risk: High

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2017-17562

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to an error in the cgiHandler function when CGI is enabled and a CGI program is dynamically linked. A remote attacker can make untrusted HTTP request parameters containing shared object payload in the cgiHandler function in cgi.c, allocate an array of pointers for the envp argument of the new process, initialize the environment of forked CGI scripts and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 3.6.5.

Vulnerable software versions

GoAhead: All versions

External links

http://www.elttam.com.au/blog/goahead/

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?

Yes. This vulnerability is being exploited in the wild.