Access of Resource Using Incompatible Type ('Type Confusion') Affecting libwbclient package, versions <2:4.17.10-0.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
3.14% (91st percentile)

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  • Snyk IDSNYK-AMZN2023-LIBWBCLIENT-5855709
  • published24 Aug 2023
  • disclosed20 Jul 2023

Introduced: 20 Jul 2023

CVE-2023-34967  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libwbclient 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 libwbclient package and not the libwbclient package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves.

CVSS Scores

version 3.1