#VU20010 Heap-based buffer overflow in Augeas - CVE-2017-7555

Vulnerability identifier: #VU20010

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7555

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Augeas
Client/Desktop applications / Software for system administration

Vendor: Red Hat Inc.

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when parsing configuration files. A local user with ability to change configuration files can add specially crafted strings, trigger heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Augeas: 0.0.1 - 1.8.0

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External links
https://www.debian.org/security/2017/dsa-3949
https://access.redhat.com/errata/RHSA-2017:2788
https://github.com/hercules-team/augeas/pull/480
https://puppet.com/security/cve/cve-2017-7555

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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.