#VU30493 Memory leak in Linux kernel - CVE-2019-20096

Vulnerability identifier: #VU30493

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20096

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within __feat_register_sp() in net/dccp/feat.c, which may cause denial of service, aka CID-1d3ff0950e2b. A remote attacker can perform a denial of service attack.

Mitigation
Update to version 5.1.

Vulnerable software versions

Linux kernel: 5.0 - 5.0.21

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
https://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1d3ff0950e2b40dc861b1739029649d03f591820
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
https://usn.ubuntu.com/4285-1/
https://usn.ubuntu.com/4286-1/
https://usn.ubuntu.com/4286-2/
https://usn.ubuntu.com/4287-1/
https://usn.ubuntu.com/4287-2/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.