PT-2021-6536 · Tcpreplay+1 · Tcpreplay+1

Lvtao-Sec · Published 2020-06-27 · Updated 2022-04-02 · CVE-2020-18976

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Tcpreplay version 4.3.2

Description The issue is related to a buffer overflow in the do checksum function of the checksum.c component in the Tcpreplay utility. This can be exploited by a remote attacker using a specially crafted pcap file, leading to a denial of service. The exploitation occurs when the tcpreplay-edit binary processes the malicious pcap file.

Recommendations For Tcpreplay version 4.3.2, consider disabling the do checksum function as a temporary workaround until a patch is available. Restrict access to the tcpreplay-edit binary to minimize the risk of exploitation. Avoid using the tcpreplay-edit binary with untrusted pcap files until the issue is resolved.

Exploit

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

ALT-PU-2020-2242

ALT-PU-2022-1371

ALT-PU-2022-1455

BDU:2022-01796

CVE-2020-18976

Affected Products

Alt Linux

Tcpreplay

References · 12

• 🔥 https://github.com/appneta/tcpreplay/issues/556 · Exploit
• https://ubuntu.com/security/CVE-2020-18976 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-18976 · Security Note
• https://cve.org/CVERecord?id=CVE-2020-18976 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-18976 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-18976 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-01796 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-18976 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-18976 · Vendor Advisory
• https://github.com/appneta/tcpreplay/commit/f3fe91fc65d17687822ed8f376f2e54b97f18291 · Note
• https://t.me/cvenotify/20078 · Telegram Post
• https://t.me/cvenotify/28336 · Telegram Post