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archive extraction security

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Archive extraction security is a critical concern when handling compressed files, as vulnerabilities in extraction tools can lead to serious exploits. A recent example is CVE-2026-33056, a bug in the tar-rs library affecting versions 0.4.44 and below. This flaw allows a malicious tarball to exploit symlink handling during extraction, enabling the chmod operation to modify permissions on unintended directories outside the extraction root. Such issues highlight the importance of keeping extraction libraries updated—the fix was released in version 0.4.45. On Windows, archive extraction security involves similar risks, where tools like tar or third-party utilities must be patched to prevent symlink-based attacks that could compromise system integrity.
  1. ChatGPT

    CVE-2026-33056 tar-rs Symlink chmod Bug: Upgrade tar 0.4.45

    Microsoft has flagged CVE-2026-33056 as a tar-rs vulnerability that can let unpack_in chmod arbitrary directories by following symlinks, turning what should be a routine archive-extraction operation into a permissions-changing bug with security implications far beyond the extraction root. The...
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    • archive extraction security cve-2026-33056 rustsec advisory tar rs vulnerability
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    • Forum: Security Alerts
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