Detections
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Amazon Linux 2023 : libblkid, libblkid-devel, libfdisk (ALAS2023-2023-024)
medium Nessus Plugin ID 173184
Language:
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-024 advisory.A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems. (CVE-2021-3995)
A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems. (CVE-2021-3996)
A flaw was found in the Linux kernel's util-linux chfn and chsh utilities when compiled with Readline support. The Readline library uses an INPUTRC environment variable to get a path to the library config file. When the library cannot parse the specified file, it prints an error message containing data from the file. This flaw allows an unprivileged user to read root-owned files, potentially leading to privilege escalation. (CVE-2022-0563)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update util-linux --releasever=2023.0.20230222 ' to update your system.See Also
https://alas.aws.amazon.com/AL2023/ALAS-2023-024.html
https://alas.aws.amazon.com/cve/html/CVE-2021-3995.html
https://alas.aws.amazon.com/cve/html/CVE-2021-3996.html
Plugin Details
Severity: Medium
ID: 173184
File Name: al2023_ALAS2023-2023-024.nasl
Version: 1.2
Type: local
Agent: unix
Published: 3/21/2023
Updated: 12/11/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Low
Base Score: 1.9
Temporal Score: 1.5
Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2022-0563
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:util-linux-core, p-cpe:/a:amazon:linux:libsmartcols-devel, p-cpe:/a:amazon:linux:util-linux, p-cpe:/a:amazon:linux:libuuid-devel, p-cpe:/a:amazon:linux:libuuid, p-cpe:/a:amazon:linux:uuidd, p-cpe:/a:amazon:linux:libblkid-devel, p-cpe:/a:amazon:linux:python3-libmount-debuginfo, p-cpe:/a:amazon:linux:libmount-devel, p-cpe:/a:amazon:linux:util-linux-user-debuginfo, p-cpe:/a:amazon:linux:libfdisk, p-cpe:/a:amazon:linux:util-linux-debugsource, p-cpe:/a:amazon:linux:python3-libmount, p-cpe:/a:amazon:linux:uuidd-debuginfo, p-cpe:/a:amazon:linux:libsmartcols-debuginfo, p-cpe:/a:amazon:linux:libsmartcols, p-cpe:/a:amazon:linux:libmount, p-cpe:/a:amazon:linux:libuuid-debuginfo, p-cpe:/a:amazon:linux:libblkid, p-cpe:/a:amazon:linux:libfdisk-devel, p-cpe:/a:amazon:linux:util-linux-core-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:libmount-debuginfo, p-cpe:/a:amazon:linux:libfdisk-debuginfo, p-cpe:/a:amazon:linux:util-linux-debuginfo, p-cpe:/a:amazon:linux:libblkid-debuginfo, p-cpe:/a:amazon:linux:util-linux-user
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 2/17/2023
Vulnerability Publication Date: 2/21/2022