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Advisories

rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow

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Severity
medium
Date
Affecting

  • rclone >= 1.75.0, < 1.75.2

CWE
  • CWE-190 Integer Overflow or Wraparound
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
Kushalkhemka, ncw, mayank-jangid-moon, skigeek16, opensec-intelligence
Description
rclone serve s3 versions 1.75.0 before 1.75.2 contain an integer overflow vulnerability in multipart reorder-memory accounting that bypasses the configured buffer limit. Attackers can open two concurrent current-part PUT requests declaring huge lengths to wrap the signed int64 counter and retain out-of-order parts in memory, exhausting the host.

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