GHSA-wfg4-322g-9vqv – memoffset

Package

Manager: cargo
Name: memoffset
Vulnerable Version: >=0 <0.6.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:R

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: N/A pctlN/A

Details

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](https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html). This flaw was corrected by using `std::ptr::addr_of` in <https://github.com/Gilnaa/memoffset/pull/50>.

Metadata

Created: 2023-06-21T22:06:29Z
Modified: 2023-06-21T22:06:29Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-wfg4-322g-9vqv/GHSA-wfg4-322g-9vqv.json
CWE IDs: []
Alternative ID: N/A
Finding: F138
Auto approve: 1