esnet iperf3 up to 3.19.0 iperf_auth.c off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in esnet iperf3 up to 3.19.0. Affected by this vulnerability is an unknown functionality of the file iperf_auth.c. Such manipulation leads to off-by-one. This vulnerability is documented as CVE-2025-54349. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in esnet iperf3 up to 3.19.0. It has been rated as problematic. Affected by this issue is an unknown function of the file iperf_auth.c. The manipulation with an unknown input leads to a off-by-one vulnerability. Using CWE to declare the problem leads to CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-54349 since 07/21/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 253491 (TencentOS Server 4: iperf3 (TSSA-2025:0670)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.19.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdf 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 databases at Tenable (253491), EUVD (EUVD-2025-23456) and CERT Bund (WID-SEC-2026-0258). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Red Hat Enterprise Linux
  • Oracle Linux
  • RESF Rocky Linux

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.3

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

NVD Base Score: 10.0
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (MITRE): 🔒

CVSSv2info

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

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 253491
Nessus Name: TencentOS Server 4: iperf3 (TSSA-2025:0670)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iperf3 3.19.1
Patch: 4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdf

Timelineinfo

07/21/2025 CVE reserved
08/03/2025 +13 days Advisory disclosed
08/03/2025 +0 days VulDB entry created
02/09/2026 +190 days VulDB entry last update

Sourcesinfo

Advisory: 4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdf
Status: Confirmed

CVE: CVE-2025-54349 (🔒)
GCVE (CVE): GCVE-0-2025-54349
GCVE (VulDB): GCVE-100-318626
EUVD: 🔒
CERT Bund: WID-SEC-2026-0258 - Red Hat Enterprise Linux (iperf3): Schwachstelle ermöglicht Codeausführung

Entryinfo

Created: 08/03/2025 11:43
Updated: 02/09/2026 14:49
Changes: 08/03/2025 11:43 (67), 08/03/2025 21:40 (1), 08/05/2025 05:00 (1), 08/05/2025 18:47 (11), 08/21/2025 19:49 (2), 01/30/2026 15:14 (7), 02/09/2026 14:49 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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