Null pointer dereference in wireshark (Alpine package)

1) Null pointer dereference

EUVDB-ID: #VU13028

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-11356

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in epan/dissectors/packet-dns.c due to NULL pointer dereference. A remote attacker can inject a malformed packet onto the wire or convince someone to read a malformed packet trace file and cause the DNS dissector to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wireshark (Alpine package): 2.2.3-r0 - 2.2.14-r0

wireshark (Alpine package):

CPE2.3

• cpe:2.3:o:alpine:wireshark_alpine_package:2.2.3-r0:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:o:alpine:wireshark_alpine_package:2.2.4-r0:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:o:alpine:wireshark_alpine_package:2.2.4-r1:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:o:alpine:wireshark_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=3707c538782fe330b200ce42050813ee9b5af560
https://git.alpinelinux.org/aports/commit/?id=563eae7149e0e113ed1dfa3bc0d6cfdb657da1a2
https://git.alpinelinux.org/aports/commit/?id=2c9c2f5d75d3f1f8579ff40387ce6d2575395477
https://git.alpinelinux.org/aports/commit/?id=215ab32e4b19dfb33cc73a102bd0beab21fe66c0

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.