Bug 2357660 (CVE-2025-32366)

Summary: CVE-2025-32366 conmann: Unbounded memcpy in DNS RR parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ConnMan's DNS proxy component. This vulnerability allows an attacker to cause a buffer overread or memory corruption via a crafted DNS response due to improper validation of the RDLENGTH field before using it in a memcpy operation.
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Bug Depends On: 2357811, 2357810    
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Description OSIDB Bzimport 2025-04-06 00:01:09 UTC
In ConnMan through 1.44, parse_rr in dnsproxy.c has a memcpy length that depends on an RR RDLENGTH value, i.e., *rdlen=ntohs(rr->rdlen) and memcpy(response+offset,*end,*rdlen).