Bug in Linux “bash” shell causes “shellshock”

Security Advisory from Digital Edge

On Wednesday, September 24th, a vulnerability in Linux bash shell was discovered. The vulnerability may allow code execution to open door for other attacks causing OS to become fully compromised. In lots of environments this vulnerability is exploitable over the network.

Digital Edge is assessing our internal environment as well as our clients’ environments and will remediate the vulnerability within the next few days. Affected Digital Edge clients will be contacted and protective actions will be discussed.

Digital Edge is committed to secure all controlled IT infrastructure environments and to advise the IT community about possible vulnerabilities, newly discovered weaknesses, hacks as well as security news and events.

If you feel that you need assistance from Digital Edge Security team please contact us at “support@digitaledge.net”

Thank you,

Digital Edge

Updated November 2026: the original post is kept above; the sections below add context for readers today.

What Shellshock was

Shellshock (CVE-2014-6271 and related flaws) let attackers run commands through specially crafted environment variables passed to bash. Web servers using CGI scripts, some DHCP clients and many network appliances were exploitable over the network, and attacks began within hours of disclosure.

The lesson still applies: widely used components buried inside other software can expose thousands of systems at once. Keep an inventory of what runs where, patch quickly and watch for exploitation attempts. Our continuous monitoring and penetration testing find such exposures before attackers do.