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mageiaGentoo FoundationMGASA-2022-0418
HistoryNov 13, 2022 - 5:25 a.m.

Updated wayland packages fix security vulnerability

2022-11-1305:25:20
Gentoo Foundation
advisories.mageia.org
34
wayland
buffer pool
security vulnerability
use-after-free
oracle
unix

CVSS3

6.6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

EPSS

0

Percentile

12.8%

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)

OSVersionArchitecturePackageVersionFilename
Mageia8noarchwayland< 1.18.0-3.1wayland-1.18.0-3.1.mga8

CVSS3

6.6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

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

EPSS

0

Percentile

12.8%