Denial of service in Linux kernel

1) Memory leak

EUVDB-ID: #VU24383

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-19079

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows a local user to cause a denial of service (memory consumption).

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.2.21

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.8:*:*:*:*:*:*:*

External links

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3
https://github.com/torvalds/linux/commit/a21b7f0cff1906a93a0130b74713b15a0b36481d

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.