Multiple vulnerabilities in Linux kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-18786 CVE-2019-18683 |
| CWE-ID | CWE-401 CWE-362 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
UPDATED: 25.12.2019
Updated references section for vulnerability #2.
1) Memory leak
EUVDB-ID: #VU22566
Risk: Low
CVSSv3.1: 3.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-18786
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due memory leak within the rcar_drif_g_fmt_sdr_cap() function in drivers/media/platform/rcar_drif.c in Linux kernel. A local user can disclose uninitialized memory.
Install updates from vendor's website.
Vulnerable software versionsLinux kernel: 5.3.1 - 5.3.8
External linkshttp://patchwork.linuxtv.org/patch/59542/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Race condition
EUVDB-ID: #VU22567
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-18683
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition, caused by wrong mutex locking in vivid_stop_generating_vid_cap(), vivid_stop_generating_vid_out(), sdr_cap_stop_streaming(), and the corresponding kthreads. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
Successful exploitation of the vulnerability requires access to /dev/video0.
MitigationInstall updates from vendor's website.
Vulnerable software versionsLinux kernel: 5.3.1 - 5.3.8
External linkshttp://www.openwall.com/lists/oss-security/2019/11/05/1
http://lore.kernel.org/lkml/20191103221719.27118-1-alex.popov@linux.com/
http://www.openwall.com/lists/oss-security/2019/11/02/1
http://www.ptsecurity.com/ww-en/analytics/threatscape/pt-2019-05/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
