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    4 vulnerabilities by digint

    CVE-2026-62943 (GCVE-0-2026-62943)

    Vulnerability from nvd – Published: 2026-09-18 16:24 – Updated: 2026-09-21 20:50
    VLAI
    Title
    btrbk: SSH Command Filter Bypass in ssh_filter_btrbk.sh
    Summary
    btrbk is a tool for creating snapshots and remote backups of Btrfs subvolumes. From 0.29.0 until 0.32.7, btrbk's ssh_filter_btrbk.sh constructs allow_stream_match with a start anchor but without an end-of-string anchor for the complete command. A user restricted through an authorized_keys forced command can append a trailing pipe command after a valid btrbk command prefix, bypassing the allowlist and executing arbitrary commands with the privileges of the backup-target SSH account. Deployments that do not use ssh_filter_btrbk.sh in authorized_keys are not affected. This issue is fixed in version 0.32.7.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-18 19:24 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    digint btrbk Affected: >= 0.29.0, < 0.32.7
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2021-38173 (GCVE-0-2021-38173)

    Vulnerability from nvd – Published: 2021-08-07 18:58 – Updated: 2024-08-04 01:37
    VLAI
    Summary
    Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.
    Severity
    No CVSS data available.
    CWE
    • n/a
    Assigner
    References
    Show details on NVD website
    To clipboard 

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    CVE-2026-62943 (GCVE-0-2026-62943)

    Vulnerability from cvelistv5 – Published: 2026-09-18 16:24 – Updated: 2026-09-21 20:50
    VLAI
    Title
    btrbk: SSH Command Filter Bypass in ssh_filter_btrbk.sh
    Summary
    btrbk is a tool for creating snapshots and remote backups of Btrfs subvolumes. From 0.29.0 until 0.32.7, btrbk's ssh_filter_btrbk.sh constructs allow_stream_match with a start anchor but without an end-of-string anchor for the complete command. A user restricted through an authorized_keys forced command can append a trailing pipe command after a valid btrbk command prefix, bypassing the allowlist and executing arbitrary commands with the privileges of the backup-target SSH account. Deployments that do not use ssh_filter_btrbk.sh in authorized_keys are not affected. This issue is fixed in version 0.32.7.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-18 19:24 UTC
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    digint btrbk Affected: >= 0.29.0, < 0.32.7
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2021-38173 (GCVE-0-2021-38173)

    Vulnerability from cvelistv5 – Published: 2021-08-07 18:58 – Updated: 2024-08-04 01:37
    VLAI
    Summary
    Btrbk before 0.31.2 allows command execution because of the mishandling of remote hosts filtering SSH commands using ssh_filter_btrbk.sh in authorized_keys.
    Severity
    No CVSS data available.
    CWE
    • n/a
    Assigner
    References
    Show details on NVD website
    To clipboard 

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