CVE-2025-65100
📋 TL;DR
CVE-2025-65100 is a vulnerability in Isar integration system where setting ISAR_APT_SNAPSHOT_DATE alone fails to properly configure security distribution timestamps, causing systems to miss critical security updates. This affects users of Isar versions 0.11-rc1 and 0.11 who rely on automated root filesystem generation. The issue could leave systems vulnerable to known exploits that should have been patched.
💻 Affected Systems
- Isar (Integration System for Automated Root filesystem generation)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Systems remain unpatched against known security vulnerabilities, potentially allowing attackers to exploit unpatched CVEs leading to full system compromise, data breaches, or service disruption.
Likely Case
Systems miss security updates, increasing attack surface and leaving them vulnerable to known exploits that should have been mitigated through regular patching.
If Mitigated
With proper monitoring and manual update verification, the impact is limited to temporary exposure until updates are manually verified and applied.
🎯 Exploit Status
This is a configuration vulnerability rather than a traditional exploit. Attackers would need to target unpatched vulnerabilities that should have been fixed through security updates.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched via commit 738bcbb (after version 0.11)
Vendor Advisory: https://github.com/ilbers/isar/security/advisories/GHSA-3r9w-6cp6-7hm4
Restart Required: No
Instructions:
1. Update Isar to version containing commit 738bcbb or later
2. Verify the fix by checking that security distribution timestamps are correctly set when using ISAR_APT_SNAPSHOT_DATE
3. Rebuild affected root filesystems
🔧 Temporary Workarounds
Manual security update verification
linuxManually verify and apply security updates instead of relying on automated timestamp configuration
apt-get update && apt-get upgrade --dry-run | grep security
apt-get update && apt-get upgrade -s | grep security
Disable ISAR_APT_SNAPSHOT_DATE
linuxTemporarily disable the problematic configuration variable and use alternative update methods
unset ISAR_APT_SNAPSHOT_DATE
export ISAR_APT_SNAPSHOT_DATE=
🧯 If You Can't Patch
- Implement manual security update verification process for all systems using Isar
- Deploy additional security monitoring to detect exploitation attempts against unpatched vulnerabilities
🔍 How to Verify
Check if Vulnerable:
Check if using Isar versions 0.11-rc1 or 0.11 with ISAR_APT_SNAPSHOT_DATE configured, and verify if security distribution updates are being missedCheck Version:
isar --version 2>/dev/null || grep -i isar /etc/os-releaseVerify Fix Applied:
After updating, verify that security distribution timestamps are correctly set when ISAR_APT_SNAPSHOT_DATE is defined📡 Detection & Monitoring
Log Indicators:
- Failed or missing security update installations
- Security package updates not appearing in apt/dpkg logs
- System running outdated security packages
Network Indicators:
- Unusual outbound connections from systems that should have been patched
- Exploitation attempts against known vulnerabilities that should have been patched
SIEM Query:
source="apt" OR source="dpkg" (NOT "security" OR NOT "Security") AND ("install" OR "upgrade")