CVE-2014-6271 PoC — GNU Bash 远程代码执行漏洞

Source

Associated Vulnerability

Title: GNU Bash 远程代码执行漏洞 (CVE-2014-6271)
Description:GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

Description

Salt recipe for  shellshock (CVE-2014-6271)

Readme

======================
shellshock bash update
======================

This recipe tries to upgrade bash from OS pkg, and falls back to 
compile bash on systems with no update available.

Works for us on old ubuntu/debian.

Bash install script from:
http://askubuntu.com/questions/528101/what-is-the-cve-2014-6271-bash-vulnerability-and-how-do-i-fix-it

Usage
=====

Can be used as an gitfs salt formula:

```yaml
fileserver_backend:
    - roots
    - git
 
gitfs_remotes:
    - git://github.com/APSL/salt-shellshock.git
```

Runit:

```sh
    $ sudo salt "oldubuntu" state.sls shellshock
```

---

bonus: Test shellshock from salt:

https://twitter.com/johan_moreau/status/515226448270213121

```
$ sudo salt -G 'kernel:Linux' cmd.run "env x='() { :;}; echo __bad' bash -c 'echo __good' 2>&1 |grep __"
```

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →