esnet iperf3 up to 3.19.0 net.c MSG_TRUNC unprotected alternate channel

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in esnet iperf3 up to 3.19.0. This affects an unknown part of the file net.c. Executing a manipulation of the argument MSG_TRUNC can lead to unprotected alternate channel. This vulnerability appears as CVE-2025-54351. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in esnet iperf3 up to 3.19.0. This vulnerability affects some unknown functionality of the file net.c. The manipulation of the argument MSG_TRUNC with an unknown input leads to a unprotected alternate channel vulnerability. The CWE definition for the vulnerability is CWE-420. The product protects a primary channel, but it does not use the same level of protection for an alternate channel. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-54351 since 07/21/2025. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading to version 3.19.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 969b7f70c447513e92c9798f22e82b40ebc53bf0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23458). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 10.0
NVD Vector: 🔒

CNA Base Score: 8.9
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unprotected alternate channel
CWE: CWE-420 / CWE-419
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iperf3 3.19.1
Patch: 969b7f70c447513e92c9798f22e82b40ebc53bf0

Timelineinfo

07/21/2025 CVE reserved
08/03/2025 +13 days Advisory disclosed
08/03/2025 +0 days VulDB entry created
08/05/2025 +2 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-54351 (🔒)
GCVE (CVE): GCVE-0-2025-54351
GCVE (VulDB): GCVE-100-318628
EUVD: 🔒

Entryinfo

Created: 08/03/2025 11:44
Updated: 08/05/2025 18:47
Changes: 08/03/2025 11:44 (67), 08/03/2025 21:40 (1), 08/05/2025 05:00 (1), 08/05/2025 18:47 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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