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Medium ALAS2023-2023-203 1 CVE

Moderate: wayland security update (Amazon Linux 2023)

Published Jun 5, 2023 · Updated Jun 7, 2023

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2021-3782: An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.

Fixed packages 13

ReleasePackageFixed in
Amazon Linux · 2023 libwayland-client 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-client-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-cursor 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-cursor-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-egl 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-egl-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-server 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 libwayland-server-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 wayland-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 wayland-debugsource 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 wayland-devel 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 wayland-devel-debuginfo 0:1.22.0-1.amzn2023.0.1
Amazon Linux · 2023 wayland-doc 0:1.22.0-1.amzn2023.0.1

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2021-3782.html