Information exposure in Linux kernel

1) Information exposure

EUVDB-ID: #VU92786

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-20449

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The hidma_chan_stats function in drivers/dma/qcom/hidma_dbg.c in the Linux kernel 4.14.90 allows local users to obtain sensitive address information by reading 'callback=' lines in a debugfs file.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

External links

http://elixir.bootlin.com/linux/v4.14.90/source/drivers/dma/qcom/hidma_dbg.c#L92
http://security.netapp.com/advisory/ntap-20190502-0002/
http://www.mail-archive.com/debian-security-tracker@lists.debian.org/msg03808.html

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.