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Advisories

Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url

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Severity
medium
Date
Affecting

  • rclone >= 0, < 1.75.2

CWE
  • CWE-319 Cleartext Transmission of Sensitive Information
CVSS
6.0
CVSS V4 Vector
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
sonicnew, iaohkut, ncw
Description
Rclone before v1.75.2 contains a credential exposure vulnerability in the b2 backend that leaks the live account Authorization token and SSE-C keys on HTTP redirects from --b2-download-url hosts. Attackers can observe a same-host HTTPS-to-HTTP downgrade redirect to capture the cleartext B2 token, or receive cross-host redirects disclosing SSE-C customer encryption keys.

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