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CVE-2018-18408

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets...

9.8 CriticalFix available

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.25%Up 1.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
CVE-2018-18408
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
CVE-2018-18408
Updated
2026-11-02
EUVDEUVD-2018-10137 No score

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
EUVD-2018-10137
Updated
2026-11-03
GitHub AdvisoriesGHSA-rc6v-3qc7-jpvm 9.8

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets...

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
GHSA-rc6v-3qc7-jpvm
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 9.8

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
CVE-2018-18408
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-18408 9.8

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
DEBIAN-CVE-2018-18408
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2018-18408 9.8

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact.

Record
UBUNTU-CVE-2018-18408
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2019-0094 No score

Updated tcpreplay packages fix security vulnerability

An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service. (CVE-2018-17974)

A heap-based buffer over-read exists in the function fast_edit_packet() in the file send_packets.c of Tcpreplay v4.3.0 beta1. This can lead to Denial of Service (DoS) and potentially Information Exposure when the application attempts to process a crafted pcap file. (CVE-2018-17580)

Tcpreplay v4.3.0 beta1 contains a heap-based buffer over-read. The get_next_packet() function in the send_packets.c file uses the memcpy() function unsafely to copy sequences from the source buffer pktdata to the destination (*prev_packet)->pktdata. This will result in a Denial of Service (DoS) and potentially Information Exposure when the application attempts to process a file. (CVE-2018-17582)

A heap-based buffer over-read was discovered in the tcpreplay-edit binary of Tcpreplay 4.3.0 beta1, during the incremental checksum operation. The issue gets triggered in the function csum_replace4() in incremental_checksum.h, causing a denial of service. (CVE-2018-18407)

A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1. The issue gets triggered in the function post_args() at tcpbridge.c, causing a denial of service or possibly unspecified other impact. (CVE-2018-18408)

Record
MGASA-2019-0094
Updated
2026-11-02
OSVopenSUSE-SU-2024:11426-1 No score

tcpreplay-4.3.4-1.3 on GA media

These are all security issues fixed in the tcpreplay-4.3.4-1.3 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11426-1
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
Mageia:6
From an advisory covering 5 CVEs
before 4.3.1-1.mga6
4.3.1-1.mga6
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:16.04:LTS
From an advisory covering 13 CVEs
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
From an advisory covering 13 CVEs
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
From an advisory covering 13 CVEs
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
From an advisory covering 13 CVEs
before 4.3.4-1ubuntu0.1~esm1, plus listed versions
4.3.3-24.3.4-1
4.3.4-1ubuntu0.1~esm1
tcpreplay
openSUSE:Tumbleweed
From an advisory covering 11 CVEs
before 4.3.4-1.3
4.3.4-1.3

History

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

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

In short

CVE-2018-18408 is a critical vulnerability (CVSS 9.8) in Broadcom Tcpreplay, published October 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.25%, the 83rd percentile. Fixed in tcpreplay 4.3.1-1.

References

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