CVE-2025-54350

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

Iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, protocols, and buffers.

Security Fix(es):

iperf is an open source tool for ESnet to actively measure the maximum bandwidth that can be achieved on an IP network. There was a security vulnerability in iperf 3.19.1 version before iperf 3.19.1. This vulnerability originated from an error in iperf_auth.c, which may cause heap buffer overflow.(CVE-2025-54349)

iperf is an open source tool for ESnet to actively measure the maximum bandwidth that can be achieved on an IP network. There was a security vulnerability in iperf 3.19.1 versions before iperf 3.19.1. This vulnerability originated from the failure of Base64 decoding assertion in iperf_auth.c, which may cause the application to exit.(CVE-2025-54350)

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

• CVE-2025-54349: fix off-by-one error and heap-based buffer overflow in iperf_auth.c
• CVE-2025-54350: prevent crash due to assertion failures on malformed authentication attempt in iperf_auth.c

• CVE-2025-54349: fix off-by-one error and heap-based buffer overflow in iperf_auth.c
• CVE-2025-54350: prevent crash due to assertion failures on malformed authentication attempt in iperf_auth.c

In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow. (CVE-2025-54349) In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt. (CVE-2025-54350)

These are all security issues fixed in the iperf-3.19.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for iperf fixes the following issues:

• update to 3.19.1:

  • CVE-2025-54351: Fixed buffer overflow in net.c (bsc#1247522)
  • CVE-2025-54350: Fixed Base64Decode assertion failure and application exit upon a malformed authentication attempt (bsc#1247520)
  • CVE-2025-54349: Fixed off-by-one error and resultant heap-based buffer overflow (bsc#1247519)

• update to 3.19:

  • iperf3 now supports the use of Multi-Path TCP (MPTCPv1) on Linux with the use of the -m or --mptcp flag. (PR #1661)
  • iperf3 now supports a --cntl-ka option to enable TCP keepalives on the control connection. (#812, #835, PR #1423)
  • iperf3 now supports the MSG_TRUNC receive option, specified by the --skip-rx-copy. This theoretically improves the rated throughput of tests at high bitrates by not delivering network payload data to userspace. (#1678, PR #1717)
  • A bug that caused the bitrate setting to be ignored when bursts are set, has been fixed. (#1773, #1820, PR #1821, PR #1848)
  • The congestion control protocol setting, if used, is now properly reset between tests. (PR #1812)
  • iperf3 now exits with a non-error 0 exit code if exiting via a SIGTERM, SIGHUP, or SIGINT. (#1009, PR# 1829)
  • The current behavior of iperf3 with respect to the -n and -k options is now documented as correct. (#1768, #1775, #596, PR #1800)

Jorge Sancho Larraz discovered that iperf3 did not properly manage certain inputs, which could cause the server process to stop responding, waiting for input on the control connection. A remote attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 22.04 LTS. (CVE-2023-7250)

It was discovered that iperf3 had a timing side-channel when performing RSA decryption. An attacker could possibly use this issue to recover sensitive information. This issue was only addressed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-26306)

It was discovered that iperf3 incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-53580)

Han Lee discovered that iperf3 had an off-by-one heap overflow. An attacker could possibly use this issue to crash the program or execute arbitrary code. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2025-54349)

Han Lee discovered that iperf3 did not properly manage certain inputs. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-54350)