6.2

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

GHSA ID

GHSA-xrv3-jmcp-374j

EPSS Score

CWE

CWE-120

Published

7/8/2024

Updated

8/7/2024

KEV Status

Technology

Rust

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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GHSA-xrv3-jmcp-374j

GHSA-xrv3-jmcp-374j: zerovec incorrectly uses `#[repr(packed)]`

The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.

The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.

The patched versions 0.9.7 and 0.10.4 use #[repr(C, packed)], which guarantees field order.

(GitHub Advisory)

Miggo Vulnerability Database

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GHSA-xrv3-jmcp-374j

GHSA-xrv3-jmcp-374j:

6.2

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

GHSA ID

GHSA-xrv3-jmcp-374j

EPSS Score

CWE

CWE-120

Published

7/8/2024

Updated

8/7/2024

KEV Status

Technology

Rust

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
zerovec	rust	>= 0.10.0, < 0.10.4	0.10.4
zerovec	rust	< 0.9.7	0.9.7

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from unsafe memory accesses to #[repr(packed)] structs that assumed field ordering. The core functions involve:

Type conversion methods (AsULE) that directly manipulate packed struct layouts
Zero-copy deserialization entry points (ZeroVec) that interpret raw bytes as packed structs
Low-level ULE handling that performs unsafe transmutes These functions would appear in stack traces when processing malformed inputs due to their direct interaction with packed struct memory layouts. The patch evidence shows the struct representations were changed to include C layout, indicating these were the unsafe interaction points.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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6.2

-

Basic Information

Basic Information

Concerned about an active attack path?

GHSA-xrv3-jmcp-374j: zerovec incorrectly uses `#[repr(packed)]`

GHSA-xrv3-jmcp-374j:

6.2

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Technical Details

GHSA-xrv3-jmcp-374j: zerovec incorrectly uses `#[repr(packed)]`

Basic Information

Basic Information

6.2

6.2

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI