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CVE-2018-20552

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

7.8 HighFix available

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.25%Up 0.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.8

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
CVE-2018-20552
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-125
Updated
2026-11-02
CVE List No score

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
CVE-2018-20552
Updated
2026-11-02
EUVDEUVD-2018-13106 No score

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
EUVD-2018-13106
Updated
2026-11-03
GitHub AdvisoriesGHSA-fcjg-28m6-vxv9 7.8

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
GHSA-fcjg-28m6-vxv9
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-125
Updated
2026-11-02
OSV 7.8

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
CVE-2018-20552
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-20552 7.8

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
DEBIAN-CVE-2018-20552
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-20552 7.8

Tcpreplay before 4.3.1 has a heap-based buffer over-read in packet2tree in tree.c.

Record
UBUNTU-CVE-2018-20552
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-5205-1 No score

tcpreplay vulnerabilities

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input when processed by tcpprep. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 ESM. (CVE-2018-13112)

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input. An attacker could possibly use this issue to cause a denial of service or expose sensitive information. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-17580, CVE-2018-17582)

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-17974, CVE-2018-18407)

It was discovered that a use-after-free existed in Tcpreplay in the tcpbridge binary. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-18408)

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2018-20552, CVE-2018-20553)

It was discovered that a heap-based buffer over-read that existed in Tcpreplay caused an application crash when tcprewrite or tcpreplay-edit received specially crafted packet capture input. An attacker could possibly use this to cause a denial of service or to expose sensitive information. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-12740)

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input when processed by tcpprep. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-24265, CVE-2020-24266)

It was discovered that Tcpreplay incorrectly handled certain specially crafted packet capture input when processed by tcprewrite. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 ESM. (CVE-2022-27416)

It was discovered that Tcpreplay did not properly manage memory under certain circumstances. If a user were tricked into opening a specially crafted packet capture file, a remote attacker could possibly use this issue to cause Tcpreplay crash, resulting in a denial of service, or possibly read sensitive data. This issue only affected Ubuntu 18.04 ESM, Ubuntu 20.04 ESM and Ubuntu 22.04 ESM. (CVE-2022-28487)

Record
USN-5205-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tcpreplay
Debian:12
before 4.3.1-1
4.3.1-1
tcpreplay
Debian:13
before 4.3.1-1
4.3.1-1
tcpreplay
Debian:14
before 4.3.1-1
4.3.1-1
tcpreplay
Ubuntu:Pro:16.04:LTS
before 3.4.4-2+deb8u1ubuntu0.1~esm2, plus listed versions
3.4.4-23.4.4-2+deb8u1build0.16.04.13.4.4-2+deb8u1ubuntu0.1~esm1
3.4.4-2+deb8u1ubuntu0.1~esm2
tcpreplay
Ubuntu:Pro:18.04:LTS
before 4.2.6-1ubuntu0.1~esm2, plus listed versions
4.2.6-14.2.6-1ubuntu0.1~esm1
4.2.6-1ubuntu0.1~esm2
tcpreplay
Ubuntu:Pro:20.04:LTS
before 4.3.2-1ubuntu0.1~esm1, plus listed versions
4.3.2-1build1
4.3.2-1ubuntu0.1~esm1
tcpreplay
Ubuntu:Pro:18.04:LTS
before 4.2.6-1ubuntu0.1~esm4, plus listed versions
4.2.6-14.2.6-1ubuntu0.1~esm14.2.6-1ubuntu0.1~esm24.2.6-1ubuntu0.1~esm3
4.2.6-1ubuntu0.1~esm4
tcpreplay
Ubuntu:Pro:20.04:LTS
before 4.3.2-1ubuntu0.1~esm2, plus listed versions
4.3.2-1build14.3.2-1ubuntu0.1~esm1
4.3.2-1ubuntu0.1~esm2
tcpreplay
Ubuntu:Pro:22.04:LTS
before 4.3.4-1ubuntu0.1~esm1, plus listed versions
4.3.3-24.3.4-1
4.3.4-1ubuntu0.1~esm1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-20552 is a high vulnerability (CVSS 7.8) in Broadcom Tcpreplay, published December 28, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. Fixed in tcpreplay 4.3.1-1.

References

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