#VU20811 Information disclosure in Linux kernel - CVE-2019-11884

Vulnerability identifier: #VU20811

Vulnerability risk: Low

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

CVE-ID: CVE-2019-11884

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability in the "do_hidp_sock_ioctl" function in "net/bluetooth/hidp/sock.c" exists due to the Bluetooth Human Interface Device Protocol (HIDP) implementation did not properly verify strings were NULL terminated in certain situations. A local authenticated user can gain unauthorized access to sensitive information from kernel stack memory via a "HIDPCONNADD" command, because a name field may not end with a '' character. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.0.14

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External links
https://www.securityfocus.com/bid/108299
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.15
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1616a5ac99ede5d605047a9012481ce7ff18b16
https://github.com/torvalds/linux/commit/a1616a5ac99ede5d605047a9012481ce7ff18b16
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KPWHQHNM2MSGO3FDJVIQXQNKYVR7TV45/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LAYXGGJUUYPOMCBZGGDCUZFLUU3JOZG5/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PF2PDXUGOFEOTPVEACKFIHQB6O4XUIZD/

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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.