Loop with Unreachable Exit Condition ('Infinite Loop') Affecting samba-client package, versions <2:4.17.10-0.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
12.9% (96th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN2023-SAMBACLIENT-5855480
  • published24 Aug 2023
  • disclosed20 Jul 2023

Introduced: 20 Jul 2023

CVE-2023-34966  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 samba-client to version 2:4.17.10-0.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2023-316.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-client package and not the samba-client package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.

CVSS Scores

version 3.1