OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| openmcdf | openmcdf | affected |
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| Openmcdf | Openmcdf |
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| Source | ID | Title |
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Github GHSA |
GHSA-5qwm-7pvp-w988 | OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.184% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Openmcdf
Openmcdf openmcdf |
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| Vendors & Products |
Openmcdf
Openmcdf openmcdf |
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| Description | OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. In 3.1.3 and earlier, the BST name-lookup loop in DirectoryTree.TryGetDirectoryEntry (OpenMcdf/DirectoryTree.cs:35-46) walks directory entries by repeatedly calling directories.TryGetSibling(child, siblingType, validateColor). A crafted CFB file with cyclic Left/Right sibling links among directory entries, constructed so the per-step BST-order check in TryGetSibling (DirectoryEntries.cs:84-85) is satisfied at every step, drives this while (child is not null) loop forever. There is no cycle detection in TryGetDirectoryEntry, and the bug is reachable from RootStorage.OpenStorage(name), TryOpenStorage(name), OpenStream(name), and TryOpenStream(name), causing an unrecoverable denial of service. This issue is fixed in version 3.1.4. | |
| Title | OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle | |
| Weaknesses | CWE-835 | |
| References |
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| Metrics |
cvssV3_1
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