Race Condition in Canonical Apport

Race condition in Canonical apport up to and including 2.32.0 allows a local attacker to leak sensitive information via PID-reuse by leveraging namespaces. When handling a crash, the function `_check_global_pid_and_forward`, which detects if the crashing process resided in a container, was being called before `consistency_checks`, which attempts to detect if the crashing process had been replaced. Because of this, if a process crashed and was quickly replaced with a containerized one, apport could be made to forward the core dump to the container, potentially leaking sensitive information. `consistency_checks` is now being called before `_check_global_pid_and_forward`. Additionally, given that the PID-reuse race condition cannot be reliably detected from userspace alone, crashes are only forwarded to containers if the kernel provided a pidfd, or if the crashing process was unprivileged (i.e., if dump mode == 1).

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

使用共享资源的并发执行不恰当同步问题(竞争条件)

Canonical Apport 安全漏洞

Canonical Apport是英国科能软件（Canonical）公司的一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Canonical Apport 2.32.0及之前版本存在安全漏洞，该漏洞源于竞争条件，可能导致敏感信息泄露。

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