CVE-2020-10232
📋 TL;DR
This CVE describes a critical stack buffer overflow vulnerability in The Sleuth Kit (TSK) forensic analysis tool. Attackers can exploit this by providing malicious YAFFS file system images to execute arbitrary code or crash the application. Anyone using TSK version 4.8.0 or earlier to analyze YAFFS file systems is affected.
💻 Affected Systems
- The Sleuth Kit (TSK)
📦 What is this software?
Fedora by Fedoraproject
Fedora by Fedoraproject
Fedora by Fedoraproject
The Sleuth Kit by Sleuthkit
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the TSK process, potentially leading to full system compromise if TSK runs with elevated privileges.
Likely Case
Application crash (denial of service) when processing malicious YAFFS images, potentially corrupting forensic analysis results.
If Mitigated
Limited to denial of service if TSK runs in sandboxed environments with minimal privileges.
🎯 Exploit Status
Exploitation requires the attacker to provide a malicious YAFFS image file that gets processed by TSK's yaffsfs_istat() function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.8.1 and later
Vendor Advisory: https://github.com/sleuthkit/sleuthkit/commit/459ae818fc8dae717549810150de4d191ce158f1
Restart Required: No
Instructions:
1. Download TSK 4.8.1 or later from the official repository. 2. Compile and install according to platform instructions. 3. Replace existing TSK binaries with patched versions.
🔧 Temporary Workarounds
Avoid YAFFS analysis
allTemporarily avoid using TSK to analyze YAFFS file system images until patched.
Run TSK with reduced privileges
linuxExecute TSK with minimal user privileges to limit potential damage from exploitation.
sudo -u lowprivuser tsk_command
🧯 If You Can't Patch
- Isolate TSK usage to dedicated forensic workstations with no network connectivity
- Implement strict input validation for all YAFFS images before processing with TSK
🔍 How to Verify
Check if Vulnerable:
Check TSK version with 'tsk_version' or 'fls -V' command. If version is 4.8.0 or earlier, system is vulnerable.Check Version:
tsk_versionVerify Fix Applied:
Verify TSK version is 4.8.1 or later using 'tsk_version' command.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from TSK processes
- Unexpected process termination of TSK tools
Network Indicators:
- Not applicable - typically offline forensic tool
SIEM Query:
Process:Name='tsk_*' AND EventID=1000 (Application Crash)🔗 References
- https://github.com/sleuthkit/sleuthkit/commit/459ae818fc8dae717549810150de4d191ce158f1
- https://lists.debian.org/debian-lts-announce/2020/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/06/msg00015.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5EY53OYU7UZLAJWNIVVNR3EX2RNCCFTB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQR2QY3IAF2IG6HGBSKGL66VUDOTC3OA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFQKIE5U3LS5U7POPGS7YHLUSW2URWGJ/
- https://github.com/sleuthkit/sleuthkit/commit/459ae818fc8dae717549810150de4d191ce158f1
- https://lists.debian.org/debian-lts-announce/2020/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/06/msg00015.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5EY53OYU7UZLAJWNIVVNR3EX2RNCCFTB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQR2QY3IAF2IG6HGBSKGL66VUDOTC3OA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFQKIE5U3LS5U7POPGS7YHLUSW2URWGJ/
