CVE-2019-3901
kernel: perf_event_open() and execve() race in setuid programs allows a data leak
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Una condición de carrera en la función perf_event_open() permite a los atacantes locales filtrar datos confidenciales desde los programas setuid. Como no se mantienen bloqueos relevantes (en particular, la función cred_guard_mutex) durante la llamada ptrace_may_access(), es posible que la tarea de destino especificada realice un syscall execve() con la ejecución setuid anterior a que perf_event_alloc() realmente se conecte, permitiendo que un atacante omita la comprobación ptrace_may_access() y la llamada perf_event_exit_task(current) que se realiza en install_exec_creds() durante las llamadas privilegiadas execve(). Este problema afecta a las versiones del kernel versión anterior a 4.8.
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-01-03 CVE Reserved
- 2019-04-22 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-667: Improper Locking
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/89937 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html | Mailing List |
|
| https://security.netapp.com/advisory/ntap-20190517-0005 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901 | 2023-02-12 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2019-3901 | 2020-07-07 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1701245 | 2020-07-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Netapp Search vendor "Netapp" | Cn1610 Firmware Search vendor "Netapp" for product "Cn1610 Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | Cn1610 Search vendor "Netapp" for product "Cn1610" | - | - |
Safe
|
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 4.8 Search vendor "Linux" for product "Linux Kernel" and version " < 4.8" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Active Iq Unified Manager For Vmware Vsphere Search vendor "Netapp" for product "Active Iq Unified Manager For Vmware Vsphere" | >= 9.5 Search vendor "Netapp" for product "Active Iq Unified Manager For Vmware Vsphere" and version " >= 9.5" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Hci Management Node Search vendor "Netapp" for product "Hci Management Node" | - | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Snapprotect Search vendor "Netapp" for product "Snapprotect" | - | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Solidfire Search vendor "Netapp" for product "Solidfire" | - | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Storage Replication Adapter For Clustered Data Ontap For Vmware Vsphere Search vendor "Netapp" for product "Storage Replication Adapter For Clustered Data Ontap For Vmware Vsphere" | >= 7.2 Search vendor "Netapp" for product "Storage Replication Adapter For Clustered Data Ontap For Vmware Vsphere" and version " >= 7.2" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Vasa Provider For Clustered Data Ontap Search vendor "Netapp" for product "Vasa Provider For Clustered Data Ontap" | >= 7.2 Search vendor "Netapp" for product "Vasa Provider For Clustered Data Ontap" and version " >= 7.2" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Virtual Storage Console For Vmware Vsphere Search vendor "Netapp" for product "Virtual Storage Console For Vmware Vsphere" | >= 7.2 Search vendor "Netapp" for product "Virtual Storage Console For Vmware Vsphere" and version " >= 7.2" | - |
Affected
| ||||||