A SNI Proxy security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 22.04 LTS, 22.10, and 23.04.

[USN-6148-1] SNI Proxy vulnerability

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Ubuntu Security Notice USN-6148-1
June 12, 2023

sniproxy vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)

Summary:

SNI Proxy could be made to crash or run programs if it received specially
crafted input.

Software Description:
- sniproxy: Transparent TLS and HTTP layer 4 proxy with SNI support

Details:

It was discovered that SNI Proxy did not properly handle wildcard backend
hosts. An attacker could possibly use this issue to cause a buffer overflow,
resulting in a denial of service, or arbitrary code execution.

Update instructions:

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

Ubuntu 23.04:
sniproxy 0.6.0-2ubuntu0.23.04.1

Ubuntu 22.10:
sniproxy 0.6.0-2ubuntu0.22.10.1

Ubuntu 22.04 LTS:
sniproxy 0.6.0-2ubuntu0.22.04.1

Ubuntu 20.04 LTS:
sniproxy 0.6.0-1ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
sniproxy 0.5.0-2ubuntu0.1~esm1

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

References:
https://ubuntu.com/security/notices/USN-6148-1
CVE-2023-25076

Package Information:
https://launchpad.net/ubuntu/+source/sniproxy/0.6.0-2ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/sniproxy/0.6.0-2ubuntu0.22.10.1
https://launchpad.net/ubuntu/+source/sniproxy/0.6.0-2ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/sniproxy/0.6.0-1ubuntu0.1