CVE-2021-26957: Out of bounds read in xcb

August 25, 2021

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because there is an out-of-bounds read in xcb::xproto::change_property(), as demonstrated by a format=32 T=u8 situation where out-of-bounds bytes are sent to an X server.

References

github.com/RustSec/advisory-db/issues/653
github.com/advisories/GHSA-2xpg-3hx4-fm9r
github.com/rtbo/rust-xcb
nvd.nist.gov/vuln/detail/CVE-2021-26957
rustsec.org/advisories/RUSTSEC-2021-0019.html

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