Input validation error in conntrack-tools (Alpine package)

1) Input validation error

EUVDB-ID: #VU33823

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-6496

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.

Mitigation

Install update from vendor's website.

Vulnerable software versions

conntrack-tools (Alpine package): 1.4.0-r0 - 1.4.3-r0

CPE2.3

• cpe:2.3:a:alpine:conntrack-tools_alpine_package:1.4.0-r0:*:*:*:*:alpine_linux:*:2.5
• cpe:2.3:a:alpine:conntrack-tools_alpine_package:1.4.1-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:conntrack-tools_alpine_package:1.4.2-r0:*:*:*:*:alpine_linux:*:2.6

External links

https://git.alpinelinux.org/aports/commit/?id=a2be806d0ef51bcece0b8488ac1e51df02a3af51
https://git.alpinelinux.org/aports/commit/?id=560c72db5cabba19ca9f2dfcdf4e6943af9f1634
https://git.alpinelinux.org/aports/commit/?id=d81b860a20979c280e455a9b68542cfd98fc1c35

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.