CVE-2025-5054

Description

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).

Reserved 2025-05-21 | Published 2025-05-30 | Updated 2025-05-30 | Assigner canonical

Problem types

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Product status

Default status
unaffected

2.20.1 before 2.20.1-0ubuntu2.30+esm5
affected

2.20.9 before 2.20.9-0ubuntu7.29+esm1
affected

2.20.11 before 2.20.11-0ubuntu27.28
affected

2.20.11 before 2.20.11-0ubuntu82.7
affected

2.28.1 before 2.28.1-0ubuntu3.6
affected

2.30.0 before 2.30.0-0ubuntu4.3
affected

2.32.0 before 2.32.0-0ubuntu5.1
affected

2.32.0 before 2.32.0-0ubuntu6
affected

2.20
affected

Credits

Qualys Threat Research Unit (TRU) reporter

References

ubuntu.com/security/notices/USN-7545-1 vendor-advisory

ubuntu.com/security/CVE-2025-5054 vdb-entry

www.qualys.com/.../05/29/apport-coredump/apport-coredump.txt third-party-advisory

cve.org (CVE-2025-5054)

nvd.nist.gov (CVE-2025-5054)

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