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Advisories

rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMS

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Severity
high
Date
Affecting

  • rclone >= 1.55.0, < 1.75.2

CWE
  • CWE-347 Improper Verification of Cryptographic Signature
CVSS
7.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Kushalkhemka, ncw, mayank-jangid-moon, skigeek16, opensec-intelligence
Description
rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts checksums from unsigned bytes preceding the PGP-clearsigned SHA256SUMS block. Attackers controlling the release distribution path can prepend an unsigned checksum line matching a malicious archive, causing selfupdate to install an attacker-controlled rclone executable.

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