Buffer Over-read in Tcpdump - CVE-2019-1010220

Vulnerability identifier: #VU19365

CSH Severity: Low

CVSS v4: 5.1 [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]

CVE-ID: CVE-2019-1010220

CWE-ID: CWE-126

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Tcpdump
Opensuse
Fedora
tcpdump

Install update from vendor's website/

Tcpdump - update to 4.9.3
tcpdump - addressed in versions 4.9.3-1.fc29, 4.9.3-1.fc30, 4.9.3-1.fc31

• 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

• Denial of service in tcpdump
• OpenSUSE Linux update for tcpdump
• OpenSUSE Linux update for tcpdump
• OpenSUSE Linux update for tcpdump
• Fedora 31 update for tcpdump
• Fedora 30 update for tcpdump
• Fedora 29 update for tcpdump