CVE-2026-62943— btrbk SSH命令过滤器绕过漏洞
一分钟漏洞结论
影响对象
digint btrbk
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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 restrict
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一、 漏洞 CVE-2026-62943 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
btrbk: SSH Command Filter Bypass in ssh_filter_btrbk.sh
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
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
来源: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-62943 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-62943 补丁与修复 (1)
CVE-2026-62943 其他参考 (2)
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Release v0.32.7: Version 0.32.7 · digint/btrbk · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-62943
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