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CBL Mariner 2.0 Security Update: wayland (CVE-2021-3782)

medium Nessus Plugin ID 173592

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of wayland installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-3782 advisory.

 - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2021-3782

Plugin Details

Severity: Medium

ID: 173592

File Name: mariner_wayland_CVE-2021-3782.nasl

Version: 1.1

Type: local

Published: 3/28/2023

Updated: 8/29/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 4.5

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:C

CVSS Score Source: CVE-2021-3782

CVSS v3

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.9

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:libwayland-client, p-cpe:/a:microsoft:cbl-mariner:libwayland-cursor, p-cpe:/a:microsoft:cbl-mariner:libwayland-egl, p-cpe:/a:microsoft:cbl-mariner:libwayland-server, p-cpe:/a:microsoft:cbl-mariner:wayland-debuginfo, p-cpe:/a:microsoft:cbl-mariner:wayland-devel, p-cpe:/a:microsoft:cbl-mariner:wayland-doc, x-cpe:/o:microsoft:cbl-mariner

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CBLMariner/release, Host/CBLMariner/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/13/2022

Vulnerability Publication Date: 9/23/2022

Reference Information

CVE: CVE-2021-3782