Description (CNA)
A vulnerability in the `zipx.Unzip` extraction routine of Develar's app-builder allows an attacker to overwrite arbitrary files on macOS APFS by exploiting a Unicode Normalization Collision combined with symlink following behavior. APFS treats certain Unicode equivalent filenames as identical (e.g., ß ↔ ss), while app builder performs no canonical normalization before validating or writing paths. As a result, a crafted ZIP archive containing: • a symlink entry named ss pointing to a target file, and • a regular file named ß containing attacker controlled data, will cause the second write to follow the symlink and overwrite the target file.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Develar / app-builder | affected 0 through 4.2.0 |
CWE
No CWE identifiers supplied.
References
- https://github.com/develar/app-builder
- http://kb.cert.org/vuls/id/293714
- https://github.com/develar/app-builder/pull/163
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.