Arbitrary return types in xcb · CVE-2021-26956 · GitHub Advisory Database · GitHub

Arbitrary return types in xcb

Critical severity GitHub Reviewed Published Aug 25, 2021 to the GitHub Advisory Database • Updated Jun 13, 2023

Package

xcb (Rust)

Affected versions

< 1.0.0

Patched versions

1.0.0

Description

The function xcb::xproto::GetPropertyReply::value() returns a slice of type T where T is an unconstrained type parameter. The raw bytes received from the X11 server are interpreted as the requested type. The users of the xcb crate are advised to only call this function with the intended types. These are u8, u16, and u32.

This issue is tracked here: rust-x-bindings/rust-xcb#95

References

Reviewed Aug 19, 2021

Published to the GitHub Advisory Database Aug 25, 2021

Last updated Jun 13, 2023

Severity

Critical

9.8

/ 10

CVSS base metrics

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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