Bug 2239452 (CVE-2023-42464)

Summary: CVE-2023-42464 netatalk: Type Confusion vulnerability in the Spotlight RPC functions in afpd deamon
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: urgent    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: netatalk 3.1.17 Doc Type: If docs needed, set a value
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Bug Depends On: 2239453, 2239454    
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Description Pedro Sampaio 2023-09-18 13:01:17 UTC 
A Type Confusion vulnerability was found in the Spotlight RPC functions in Netatalk's afpd daemon. When parsing Spotlight 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 underlying 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 malicious actor may be able to fully control the value of the pointer and theoretically achieve Remote Code Execution on the host.

The underlying code for Spotlight queries in Netatalk shares a common heritage with Samba, and hence the root cause and fix are logically identical with those described in CVE-2023-34967.

References:

https://github.com/Netatalk/netatalk/issues/486
Comment 1 Pedro Sampaio 2023-09-18 13:01:36 UTC 
Created netatalk tracking bugs for this issue:

Affects: epel-all [bug 2239454]
Affects: fedora-all [bug 2239453]