Denial of service in bind (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-8864
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		bind (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) Denial of service

EUVDB-ID: #VU1132

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8864

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to imptoper input validation. By returning a recursive response containing a specially crafted DNAME answer, a remote attacker can trigger a flaw in 'db.c' or 'resolver.c' and cause the target resolver to crash.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.8.4-r0 - 9.10.4_p3-r1

CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=71193af0722980dd21596f020d001f1b73a40383
http://git.alpinelinux.org/aports/commit/?id=17145b1054ffad168ad877b19aeb20cf3281d0f8
http://git.alpinelinux.org/aports/commit/?id=a9ae11632d867fd80a26c4b62229853c4f499f2f


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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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