The ShellShock Bug

Description

Shellshock, also known as Bashdoor, is a critical vulnerability in the Unix Bash shell that allows attackers to execute arbitrary commands and gain unauthorized access. By exploiting this bug, attackers can remotely execute code on vulnerable systems, leading to significant security breaches and potential data loss.

Recommendation

Upgrade Bash to the latest stable version immediately. Apply patches provided by your operating system vendor or manually update Bash to mitigate the risk of exploitation. Additionally, implement network-level defenses such as intrusion detection and prevention systems to detect and block malicious activity targeting the ShellShock vulnerability.

References

• CVE-2014-6271
• CVE-2014-6277
• CVE-2014-6278
• CVE-2014-7169
• CWE-20
• CWE-78
• OWASP 2021-A3
• OWASP 2021-A6
• Wikipedia: Shellshock (software bug)