Amazon Linux AMI update for avahi

1) Input validation error

EUVDB-ID: #VU75444

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-1981

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A local user can initiate a DBUS call to the daemon and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    avahi-libs-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-debugsource-0.8-14.amzn2023.0.10.aarch64
    avahi-dnsconfd-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-glib-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-tools-0.8-14.amzn2023.0.10.aarch64
    avahi-autoipd-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-libdns_sd-devel-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-libdns_sd-0.8-14.amzn2023.0.10.aarch64
    avahi-glib-devel-0.8-14.amzn2023.0.10.aarch64
    avahi-autoipd-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-libs-0.8-14.amzn2023.0.10.aarch64
    avahi-gobject-0.8-14.amzn2023.0.10.aarch64
    avahi-devel-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-howl-0.8-14.amzn2023.0.10.aarch64
    avahi-dnsconfd-0.8-14.amzn2023.0.10.aarch64
    avahi-gobject-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-0.8-14.amzn2023.0.10.aarch64
    avahi-ui-gtk3-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-howl-devel-0.8-14.amzn2023.0.10.aarch64
    avahi-ui-devel-0.8-14.amzn2023.0.10.aarch64
    avahi-tools-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-howl-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-ui-gtk3-0.8-14.amzn2023.0.10.aarch64
    avahi-glib-0.8-14.amzn2023.0.10.aarch64
    avahi-compat-libdns_sd-debuginfo-0.8-14.amzn2023.0.10.aarch64
    avahi-gobject-devel-0.8-14.amzn2023.0.10.aarch64

src:
    avahi-0.8-14.amzn2023.0.10.src

x86_64:
    avahi-compat-libdns_sd-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-ui-devel-0.8-14.amzn2023.0.10.x86_64
    avahi-glib-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-debugsource-0.8-14.amzn2023.0.10.x86_64
    avahi-autoipd-0.8-14.amzn2023.0.10.x86_64
    avahi-0.8-14.amzn2023.0.10.x86_64
    avahi-compat-libdns_sd-0.8-14.amzn2023.0.10.x86_64
    avahi-autoipd-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-compat-howl-devel-0.8-14.amzn2023.0.10.x86_64
    avahi-tools-0.8-14.amzn2023.0.10.x86_64
    avahi-ui-gtk3-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-glib-devel-0.8-14.amzn2023.0.10.x86_64
    avahi-libs-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-dnsconfd-0.8-14.amzn2023.0.10.x86_64
    avahi-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-dnsconfd-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-ui-gtk3-0.8-14.amzn2023.0.10.x86_64
    avahi-gobject-0.8-14.amzn2023.0.10.x86_64
    avahi-libs-0.8-14.amzn2023.0.10.x86_64
    avahi-compat-howl-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-compat-howl-0.8-14.amzn2023.0.10.x86_64
    avahi-glib-0.8-14.amzn2023.0.10.x86_64
    avahi-gobject-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-gobject-devel-0.8-14.amzn2023.0.10.x86_64
    avahi-tools-debuginfo-0.8-14.amzn2023.0.10.x86_64
    avahi-compat-libdns_sd-devel-0.8-14.amzn2023.0.10.x86_64
    avahi-devel-0.8-14.amzn2023.0.10.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

avahi: before 0.8-14

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:avahi:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-332.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.