CVE-2019-3901

A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.

References

Affected packages

Git /

Affected ranges

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-3901.json"

unresolved_ranges

[
    {
        "events":  [
            {
                "introduced":  "0"
            },
            {
                "fixed":  "4.8"
            }
        ]
    },
    {
        "events":  [
            {
                "introduced":  "0"
            },
            {
                "last_affected":  "8.0"
            }
        ]
    },
    {
        "events":  [
            {
                "introduced":  "9.5"
            }
        ]
    },
    {
        "events":  [
            {
                "introduced":  "7.2"
            }
        ]
    },
    {
        "events":  [
            {
                "introduced":  "7.2"
            }
        ]
    },
    {
        "events":  [
            {
                "introduced":  "7.2"
            }
        ]
    }
]