Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS13Zmc0LTMyMmctOXZxds4AAz-b

memoffset allows reading uninitialized memory

memoffset allows attempt of reading data from address 0 with arbitrary type. This behavior is an undefined behavior because address 0 to std::mem::size_of<T> may not have valid bit-pattern with T. Old implementation dereferences uninitialized memory obtained from std::mem::align_of. Older implementation prior to it allows using uninitialized data obtained from std::mem::uninitialized with arbitrary type then compute offset by taking the address of field-projection. This may also result in an undefined behavior for "father" that includes (directly or transitively) type that does not allow to be uninitialized.

This flaw was corrected by using std::ptr::addr_of in https://github.com/Gilnaa/memoffset/pull/50.

Permalink: https://github.com/advisories/GHSA-wfg4-322g-9vqv
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS13Zmc0LTMyMmctOXZxds4AAz-b
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 11 months ago
Updated: 11 months ago

Identifiers: GHSA-wfg4-322g-9vqv
References:

• https://github.com/Gilnaa/memoffset/issues/24
• https://github.com/Gilnaa/memoffset/pull/50
• https://rustsec.org/advisories/RUSTSEC-2023-0045.html
• https://github.com/advisories/GHSA-wfg4-322g-9vqv

Repository: https://github.com/Gilnaa/memoffset
Blast Radius: 0.0

Affected Packages