CVE-2023-49287
📋 TL;DR
CVE-2023-49287 is a buffer overflow vulnerability in TinyDir's tinydir_file_open() function that could allow attackers to execute arbitrary code or crash applications. This affects any software using TinyDir versions before 1.2.6. Developers and organizations using TinyDir in their C/C++ applications are at risk.
💻 Affected Systems
- TinyDir library
- Applications embedding TinyDir
📦 What is this software?
Tinydir by Cxong
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) or limited code execution within the application's context.
If Mitigated
Application crash with no further impact if proper memory protections (ASLR, DEP) are enabled.
🎯 Exploit Status
Proof-of-concept code is publicly available. Exploitation requires understanding of memory layout and bypassing mitigations like ASLR.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.6
Vendor Advisory: https://github.com/cxong/tinydir/security/advisories/GHSA-jf5r-wgf4-qhxf
Restart Required: Yes
Instructions:
1. Update TinyDir to version 1.2.6 or later. 2. Recompile all applications using TinyDir. 3. Restart affected services.
🔧 Temporary Workarounds
Input validation wrapper
allAdd input validation before calling tinydir_file_open() to limit path lengths
// C code example: if(strlen(path) < MAX_PATH_LIMIT) tinydir_file_open(...)
🧯 If You Can't Patch
- Implement strict input validation for all paths passed to tinydir_file_open()
- Deploy memory protection mechanisms (ASLR, DEP, stack canaries) and monitor for crashes
🔍 How to Verify
Check if Vulnerable:
Check if application links to TinyDir version <1.2.6 using ldd (Linux) or dependency walker toolsCheck Version:
grep -r "tinydir" in source code or check package manager for libtinydir versionVerify Fix Applied:
Verify TinyDir version is 1.2.6+ and application has been recompiled with updated library📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Unexpected process termination
Network Indicators:
- Unusual outbound connections from affected applications
SIEM Query:
Process: (Name contains "application_using_tinydir") AND (TerminationReason contains "Segmentation fault")🔗 References
- http://packetstormsecurity.com/files/176060/TinyDir-1.2.5-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2023/Dec/14
- http://www.openwall.com/lists/oss-security/2023/12/04/1
- https://github.com/cxong/tinydir/releases/tag/1.2.6
- https://github.com/cxong/tinydir/security/advisories/GHSA-jf5r-wgf4-qhxf
- http://packetstormsecurity.com/files/176060/TinyDir-1.2.5-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2023/Dec/14
- http://www.openwall.com/lists/oss-security/2023/12/04/1
- https://github.com/cxong/tinydir/releases/tag/1.2.6
- https://github.com/cxong/tinydir/security/advisories/GHSA-jf5r-wgf4-qhxf
