In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-19519 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of tcpdump as shipped with Red Hat Enterprise Linux 7.
This issue did not affect the versions of tcpdump as shipped with Red Hat Enterprise Linux 5 and 6.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 4.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | None |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | tcpdump | Affected |
| Red Hat Enterprise Linux 6 | tcpdump | Not affected |
| Red Hat Enterprise Linux 5 | tcpdump | Not affected |
Vulmon