#VU14821 Information disclosure in Dropbear - CVE-2017-9079

Vulnerability identifier: #VU14821

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9079

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Dropbear
Server applications / Remote management servers, RDP, SSH

Vendor: Matt Johnston

Description

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

The vulnerability exists due to the application allows usage of symlinks when configured with authorized_keys file format and a command= option. A local user can read certain files on the system with root privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Dropbear: 0.28 - 2016.74

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External links
https://matt.ucc.asn.au/dropbear/dropbear.html
https://matt.ucc.asn.au/dropbear/CHANGES

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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.