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Fencer Vulns
high 7.5

CVE-2020-24265 json

An issue was discovered in tcpreplay tcpprep v4.3.3.

published 2020-10-19 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17000

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

An issue was discovered in tcpreplay tcpprep v4.3.3. There is a heap buffer overflow vulnerability in MemcmpInterceptorCommon() that can make tcpprep crash and cause a denial of service.

Patch / fix

  • tcpreplay Debian 14, Debian 13, Debian 12 4.3.4-1

debian advisories DEBIAN-CVE-2020-24265

  • tcpreplay Ubuntu Pro 18.04 LTS 4.2.6-1ubuntu0.1~esm3
  • tcpreplay Ubuntu Pro 20.04 LTS 4.3.2-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-24265

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tcpreplay openSUSE Tumbleweed 4.3.4-1.3

opensuse advisories openSUSE-SU-2024:11426-1

  • tcpreplay Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 4.3.4-r0

alpine advisories ALPINE-CVE-2020-24265

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-24265 updated cvss 7.5

tcpreplay: heap buffer overflow in MemcmpInterceptorCommon() could result in a crash

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.23% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/appneta/tcpreplay/issues/616 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.