Race condition in bind (Alpine package)

1) Race condition

EUVDB-ID: #VU31832

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/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-2015-8461

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Race condition in resolver.c in named in ISC BIND 9.9.8 before 9.9.8-P2 and 9.10.3 before 9.10.3-P2 allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via unspecified vectors.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.10.2_p4-r0 - 9.10.3-r1

CPE2.3

• cpe:2.3:o:alpine:bind_alpine_package:9.10.2_p4-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:bind_alpine_package:9.10.3-r1:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:bind_alpine_package:9.10.3-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=a9e290c633ebcf446ba180a4b13bfde2142586b7
http://git.alpinelinux.org/aports/commit/?id=1ff937645312f327b3825526db2133d5f1a5edda
http://git.alpinelinux.org/aports/commit/?id=b61c35eaae2f0e5dbb0c7abcd4039ccf887cdf93

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.