CVE-2013-7325
📋 TL;DR
CVE-2013-7325 is a remote code execution vulnerability in the uscan tool of devscripts package. Attackers can execute arbitrary code by tricking users into processing a maliciously crafted tarball. This affects systems running devscripts before version 2.13.19.
💻 Affected Systems
- devscripts
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the privileges of the user running uscan, potentially leading to data theft, lateral movement, or persistence.
Likely Case
Local privilege escalation or arbitrary code execution in the context of the user running uscan, potentially compromising package management systems.
If Mitigated
No impact if patched or if uscan is not used to process untrusted tarballs from malicious sources.
🎯 Exploit Status
Exploitation requires user to run uscan on a malicious tarball. Proof of concept exists in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.13.19 and later
Vendor Advisory: https://security-tracker.debian.org/tracker/CVE-2013-7325
Restart Required: No
Instructions:
1. Update devscripts package using your distribution's package manager. 2. For Debian/Ubuntu: sudo apt-get update && sudo apt-get install devscripts. 3. Verify version is 2.13.19 or higher.
🔧 Temporary Workarounds
Disable uscan usage
linuxPrevent execution of uscan tool on untrusted tarballs
chmod -x /usr/bin/uscan
mv /usr/bin/uscan /usr/bin/uscan.disabled
Restrict uscan permissions
linuxRun uscan with reduced privileges using sudo restrictions
sudo visudo -f /etc/sudoers.d/uscan-restrict
Add: username ALL=(ALL) NOPASSWD: /usr/bin/uscan --safe-mode
🧯 If You Can't Patch
- Avoid running uscan on tarballs from untrusted sources
- Implement strict file integrity monitoring on uscan binary and related directories
🔍 How to Verify
Check if Vulnerable:
Check devscripts version: dpkg -l | grep devscriptsCheck Version:
dpkg -s devscripts | grep VersionVerify Fix Applied:
Verify version is 2.13.19 or higher: dpkg -s devscripts | grep Version📡 Detection & Monitoring
Log Indicators:
- Unusual uscan process execution patterns
- Suspicious tarball processing in system logs
Network Indicators:
- Downloads of unusual tarballs followed by uscan execution
SIEM Query:
process.name:"uscan" AND process.args:"*.tar.*"🔗 References
- http://www.openwall.com/lists/oss-security/2014/02/12/14
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-7325
- https://security-tracker.debian.org/tracker/CVE-2013-7325
- http://www.openwall.com/lists/oss-security/2014/02/12/14
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-7325
- https://security-tracker.debian.org/tracker/CVE-2013-7325
