File injection in pdns-recursor (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-15093
CWE-ID CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
 pdns-recursor (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) File injection

EUVDB-ID: #VU9440

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15093

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to inject API file on the target system.

The vulnerability exists in the API of PowerDNS Recursor during a source code audit by Nixu due to insufficient validation of the new netmask and IP addresses of forwarded zones. A remote attacker can add and remove netmasks when api-config-dir is set to a non-empty value and inject new configuration directives into the Recursor’s configuration.

Mitigation

Install update from vendor's website.

Vulnerable software versions

pdns-recursor (Alpine package): 4.0.4-r0 - 4.0.9-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=c9348fdd367c1a3bd5601701acba7353ae984c3a
https://git.alpinelinux.org/aports/commit/?id=cc8761a9a2849c5e5a49af8667dbea9a2aeb990d
https://git.alpinelinux.org/aports/commit/?id=0821b9aa215845c51715531d9478f41a9322f98c


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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