Vulmon
Amazon Linux 2 Security Advisory: ALAS-2023-2103
Advisory Release Date: 2023-06-21 19:11 Pacific
Advisory Updated Date: 2023-06-29 19:46 Pacific
Severity:
Medium
Issue Overview:
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. (CVE-2021-3782)
Affected Packages:
wayland
Issue Correction:
Run yum update wayland to update your system.
New Packages:
aarch64:
wayland-devel-1.17.0-1.amzn2.0.1.aarch64
libwayland-client-1.17.0-1.amzn2.0.1.aarch64
libwayland-cursor-1.17.0-1.amzn2.0.1.aarch64
libwayland-egl-1.17.0-1.amzn2.0.1.aarch64
libwayland-server-1.17.0-1.amzn2.0.1.aarch64
wayland-debuginfo-1.17.0-1.amzn2.0.1.aarch64
i686:
wayland-devel-1.17.0-1.amzn2.0.1.i686
libwayland-client-1.17.0-1.amzn2.0.1.i686
libwayland-cursor-1.17.0-1.amzn2.0.1.i686
libwayland-egl-1.17.0-1.amzn2.0.1.i686
libwayland-server-1.17.0-1.amzn2.0.1.i686
wayland-debuginfo-1.17.0-1.amzn2.0.1.i686
noarch:
wayland-doc-1.17.0-1.amzn2.0.1.noarch
src:
wayland-1.17.0-1.amzn2.0.1.src
x86_64:
wayland-devel-1.17.0-1.amzn2.0.1.x86_64
libwayland-client-1.17.0-1.amzn2.0.1.x86_64
libwayland-cursor-1.17.0-1.amzn2.0.1.x86_64
libwayland-egl-1.17.0-1.amzn2.0.1.x86_64
libwayland-server-1.17.0-1.amzn2.0.1.x86_64
wayland-debuginfo-1.17.0-1.amzn2.0.1.x86_64