Null pointer dereference in wireshark (Alpine package)

1) Null pointer dereference

EUVDB-ID: #VU11466

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17997

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-mrdisc.c due to the MRDISC dissector misuses a NULL pointer and crashes. A remote attacker can trigger NULL pointer dereference and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wireshark (Alpine package): 2.2.3-r0 - 2.2.11-r0

wireshark (Alpine package):

CPE2.3

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

External links

https://git.alpinelinux.org/aports/commit/?id=0527a05ac554c985be077f5f10dad5f9cf57947f
https://git.alpinelinux.org/aports/commit/?id=1daabb33a670a82e98b752af7e6918e9fe60a10d

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.