#VU19186 Information disclosure in Linux kernel - CVE-2019-10638

Vulnerability identifier: #VU19186

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10638

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to the software uses the IP ID values that the kernel produces for connectionless protocols. A remote attacker with a crafted web page can forge the targeted system to send UDP traffic to an attacker-controlled IP address to gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.0.0 - 5.0.7, 5.1.1 - 5.1.6

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External links
https://arxiv.org/pdf/1906.10478.pdf
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.7
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=355b98553789b646ed97ad801a619ff898471b92
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=df453700e8d81b1bdafdf684365ee2b9431fb702
https://github.com/torvalds/linux/commit/355b98553789b646ed97ad801a619ff898471b92
https://github.com/torvalds/linux/commit/55f0fc7a02de8f12757f4937143d8d5091b2e40b
https://github.com/torvalds/linux/commit/df453700e8d81b1bdafdf684365ee2b9431fb702

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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.