CyberRota Analysis
AI-GeneratedThe async-tar library, used for reading and writing tar archives in asynchronous Rust applications, contains a vulnerability that allows an attacker to manipulate the parsing of tar files by misapplying buffered PAX size extensions. This can lead to desynchronization in the parsing process, potentially resulting in data corruption or exploitation of the application using the library. Developers and organizations utilizing async-tar versions prior to 0.6.1 should prioritize upgrading to the patched version to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
async-tar is a tar archive reading/writing library for async Rust. Prior to version 0.6.1, async-tar mis-applies a buffered PAX size extension to an intermediary extension header (a GNU longname L, a GNU longlink K, or a PAX x/g header) instead of to the next file entry. POSIX requires a PAX extended-header record set to describe the next file entry, never an intervening extension header. Because poll_next_raw (src/archive.rs) threads the buffered PAX records into the size computation of whatever raw header it reads next — and that header can be an intermediary L — the stream cursor is advanced by an attacker-chosen amount when the L body is consumed. The parser then desyncs relative to a POSIX-correct tar parser (e.g. GNU tar), reading subsequent bytes at the wrong block boundary. This issue has been patched in version 0.6.1.