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Fencer Vulns
high 7.5

CVE-2023-27786 json

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the macinstring function.

published 2023-03-16 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-31522

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

An issue found in TCPprep v.4.4.3 allows a remote attacker to cause a denial of service via the macinstring function.

Patch / fix

  • tcpreplay Debian 14, Debian 13 4.4.4-1

debian advisories DEBIAN-CVE-2023-27786

  • tcpreplay Ubuntu Pro 16.04 LTS 3.4.4-2+deb8u1ubuntu0.1~esm3
  • tcpreplay Ubuntu Pro 18.04 LTS 4.2.6-1ubuntu0.1~esm5
  • tcpreplay Ubuntu Pro 20.04 LTS 4.3.2-1ubuntu0.1~esm3
  • tcpreplay Ubuntu Pro 22.04 LTS 4.3.4-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2023-27786

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 4.4.4-1.1
  • tcpreplay Package Hub 15 SP5, Package Hub 15 SP4, openSUSE Leap 15.5 +1 more 4.4.4-bp155.2.3.1

opensuse advisories openSUSE-SU-2024:13108-1openSUSE-SU-2023:0267-1

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-2023-27786 updated cvss 7.5

net-analyzer/tcpreplay: multiple vulnerabilities

  • 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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

1.47% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/appneta/tcpreplay/issues/782 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.