Deno's --deny-write check does not prevent permission bypass
Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, Deno.FsFile.prototype.utime and Deno.FsFile.prototype.utimeSync are not limited by the permission model check --deny-write=./. It's possible to change to change the access (atime) and modification (mtime) times on the file stream resource even when the file is opened with read only permission (and write: false) and file write operations are not allowed (the script is executed with --deny-write=./). Similar APIs like Deno.utime and Deno.utimeSync require allow-write permission, however, when a file is opened, even with read only flags and deny-write permission, it's still possible to change the access (atime) and modification (mtime) times, and thus bypass the permission model. Versions 2.5.3 and 2.2.15 fix the issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
denocrates.io | < 2.5.3 | 2.5.3 |
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-vg2r-rmgp-cgqjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-61785ghsaADVISORY
- github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739bghsax_refsource_MISCWEB
- github.com/denoland/deno/pull/30872ghsax_refsource_MISCWEB
- github.com/denoland/deno/releases/tag/v2.2.15ghsax_refsource_MISCWEB
- github.com/denoland/deno/releases/tag/v2.5.3ghsax_refsource_MISCWEB
- github.com/denoland/deno/security/advisories/GHSA-vg2r-rmgp-cgqjghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.