Integer Overflow or Wraparound Affecting wayland package, versions <1.21.0-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.04% (16th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-DEBIANUNSTABLE-WAYLAND-3041020
  • published7 Oct 2022
  • disclosed23 Sept 2022

Introduced: 23 Sep 2022

CVE-2021-3782  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Debian:unstable wayland to version 1.21.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wayland package and not the wayland package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Scores

version 3.1