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Apache Server - Remote Code Execution (Shellshock - CVE-2014-6271) (CVE-2014-6271)

Severity
CVSSv3 Score
9.8
Vulnerability description

Apache server is affected by a Remote Code Execution vulnerability, located in the bash environment variables. The root cause of this vulnerability consists in using a version of the bash binary before 4.3 which processes trailing strings after function definitions. Therefore, an unauthenticated remote attacker could use the Common Gateway Interface (CGI) and a crafted HTTP header like User-Agent to to execute commands on the server.

Risk description

The risk exists that a remote unauthenticated attacker can fully compromise the server in order to steal confidential information, install ransomware, or pivot to the internal network.

Exploit capabilities

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

Recommendation

Upgrade bash utilitary to the latest version.

Codename
Shellshock
Detectable with
Network Scanner
Exploitable with Sniper
Yes
Vuln date
Sep 2014
Published at
Updated at
Software Type
Utility
Vendor
GNU Project
Product
Bash