SB2019072215 - Denial of service in tcpdump

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer Over-read (CVE-ID: CVE-2019-1010220)

CWE-ID: CWE-126 - Buffer over-read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to buffer over-read issue in the "print_prefix" function in "print-hncp.c" file via the "ND_PRINT((ndo, "%s", buf));" commponent. A remote attacker can trick a victim to open a specially crafted pcap file, trigger a buffer over-read condition and cause the affected application to crash.

Remediation

Install update from vendor's website.

References

• https://github.com/the-tcpdump-group/tcpdump/blob/master/print-hncp.c
• https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9.2/print-hncp.c
• https://github.com/the-tcpdump-group/tcpdump/commits/master/print-hncp.c
• https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES