S3QL Checksumming Vulnerability: Replay Attacks and File Manipulation

CVE-2018-12088 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

S3QL before 2.27 mishandles checksumming, and consequently allows replay attacks in which an attacker who controls the backend can present old versions of the filesystem metadata database as up-to-date, temporarily inject zero-valued bytes into files, or temporarily hide parts of files. This is related to the checksum_basic_mapping function.

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