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GNU Bash Environment Variable Handling Shell Remote Command Execution Vulnerability (FTP Check)
Information
Severity
Severity
Critical
Family
Family
FTP
CVSSv2 Base
CVSSv2 Base
10.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
9 years ago
Modified
Modified
5 years ago
Summary
This host is installed with GNU Bash Shell and is prone to remote command execution vulnerability.
Insight
Insight
GNU bash contains a flaw that is triggered when evaluating environment variables passed from another environment. After processing a function definition, bash continues to process trailing strings.
Affected Software
Affected Software
GNU Bash through 4.3
Detection Method
Detection Method
Send a FTP login request and check remote command execution.
Solution
Solution
Apply the patch or upgrade to latest version.
Common Vulnerabilities and Exposures (CVE)
References
- https://gist.github.com/jedisct1/88c62ee34e6fa92c31dc
- https://access.redhat.com/solutions/1207723
- https://bugzilla.redhat.com/show_bug.cgi?id=1141597
- https://blogs.akamai.com/2014/09/environment-bashing.html
- https://community.qualys.com/blogs/securitylabs/2014/09/24/
- http://www.gnu.org/software/bash/