USN-8731-1: MiniUPnPd vulnerability

Publication date

7 September 2026

Overview

MiniUPnPd could be made to crash or expose sensitive information if it received specially crafted network traffic.


Packages

  • miniupnpd - UPnP Internet Gateway Device Daemon

Details

It was discovered that MiniUPnPd contained an integer underflow
vulnerability in SOAPAction header parsing. A remote attacker could
use this issue to cause a denial of service or information disclosure
by sending a malformed SOAPAction header with a single quote.

It was discovered that MiniUPnPd contained an integer underflow
vulnerability in SOAPAction header parsing. A remote attacker could
use this issue to cause a denial of service or information disclosure
by sending a malformed SOAPAction header with a single quote.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.04 LTS resolute miniupnpd –  2.3.9-2ubuntu0.1~esm1  
miniupnpd-iptables –  2.3.9-2ubuntu0.1~esm1  
miniupnpd-nftables –  2.3.9-2ubuntu0.1~esm1  
24.04 LTS noble miniupnpd –  2.3.4-1ubuntu0.1~esm1  
miniupnpd-iptables –  2.3.4-1ubuntu0.1~esm1  
miniupnpd-nftables –  2.3.4-1ubuntu0.1~esm1  
22.04 LTS jammy miniupnpd –  2.2.3-1ubuntu0.1~esm1  
miniupnpd-iptables –  2.2.3-1ubuntu0.1~esm1  
miniupnpd-nftables –  2.2.3-1ubuntu0.1~esm1  
20.04 LTS focal miniupnpd –  2.1-6.1ubuntu0.1~esm1  
18.04 LTS bionic miniupnpd –  2.0.20171212-2ubuntu0.1~esm1  
16.04 LTS xenial miniupnpd –  1.8.20140523-4.1+deb9u2ubuntu0.1~esm1

Reduce your security exposure

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Have additional questions?

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