Amazon Linux AMI update for avahi



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-38469
CVE-2023-38470
CVE-2023-38471
CWE-ID CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

avahi
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU79306

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-38469

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion within the avahi_dns_packet_append_record() function. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    avahi-compat-howl-0.6.25-12.19.amzn1.i686
    avahi-devel-0.6.25-12.19.amzn1.i686
    avahi-gobject-devel-0.6.25-12.19.amzn1.i686
    avahi-dnsconfd-0.6.25-12.19.amzn1.i686
    avahi-autoipd-0.6.25-12.19.amzn1.i686
    avahi-gobject-0.6.25-12.19.amzn1.i686
    avahi-libs-0.6.25-12.19.amzn1.i686
    avahi-tools-0.6.25-12.19.amzn1.i686
    avahi-glib-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.i686
    avahi-glib-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.i686
    avahi-0.6.25-12.19.amzn1.i686
    avahi-debuginfo-0.6.25-12.19.amzn1.i686

src:
    avahi-0.6.25-12.19.amzn1.src

x86_64:
    avahi-glib-0.6.25-12.19.amzn1.x86_64
    avahi-tools-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-0.6.25-12.19.amzn1.x86_64
    avahi-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.x86_64
    avahi-autoipd-0.6.25-12.19.amzn1.x86_64
    avahi-debuginfo-0.6.25-12.19.amzn1.x86_64
    avahi-libs-0.6.25-12.19.amzn1.x86_64
    avahi-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-devel-0.6.25-12.19.amzn1.x86_64
    avahi-dnsconfd-0.6.25-12.19.amzn1.x86_64
    avahi-glib-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

avahi: before 0.6.25-12.19

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1790.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Reachable Assertion

EUVDB-ID: #VU79307

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-38470

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion within the avahi_escape_label() function. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    avahi-compat-howl-0.6.25-12.19.amzn1.i686
    avahi-devel-0.6.25-12.19.amzn1.i686
    avahi-gobject-devel-0.6.25-12.19.amzn1.i686
    avahi-dnsconfd-0.6.25-12.19.amzn1.i686
    avahi-autoipd-0.6.25-12.19.amzn1.i686
    avahi-gobject-0.6.25-12.19.amzn1.i686
    avahi-libs-0.6.25-12.19.amzn1.i686
    avahi-tools-0.6.25-12.19.amzn1.i686
    avahi-glib-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.i686
    avahi-glib-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.i686
    avahi-0.6.25-12.19.amzn1.i686
    avahi-debuginfo-0.6.25-12.19.amzn1.i686

src:
    avahi-0.6.25-12.19.amzn1.src

x86_64:
    avahi-glib-0.6.25-12.19.amzn1.x86_64
    avahi-tools-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-0.6.25-12.19.amzn1.x86_64
    avahi-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.x86_64
    avahi-autoipd-0.6.25-12.19.amzn1.x86_64
    avahi-debuginfo-0.6.25-12.19.amzn1.x86_64
    avahi-libs-0.6.25-12.19.amzn1.x86_64
    avahi-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-devel-0.6.25-12.19.amzn1.x86_64
    avahi-dnsconfd-0.6.25-12.19.amzn1.x86_64
    avahi-glib-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

avahi: before 0.6.25-12.19

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1790.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Reachable Assertion

EUVDB-ID: #VU79308

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-2023-38471

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion within the dbus_set_host_name() function. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    avahi-compat-howl-0.6.25-12.19.amzn1.i686
    avahi-devel-0.6.25-12.19.amzn1.i686
    avahi-gobject-devel-0.6.25-12.19.amzn1.i686
    avahi-dnsconfd-0.6.25-12.19.amzn1.i686
    avahi-autoipd-0.6.25-12.19.amzn1.i686
    avahi-gobject-0.6.25-12.19.amzn1.i686
    avahi-libs-0.6.25-12.19.amzn1.i686
    avahi-tools-0.6.25-12.19.amzn1.i686
    avahi-glib-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.i686
    avahi-glib-devel-0.6.25-12.19.amzn1.i686
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.i686
    avahi-0.6.25-12.19.amzn1.i686
    avahi-debuginfo-0.6.25-12.19.amzn1.i686

src:
    avahi-0.6.25-12.19.amzn1.src

x86_64:
    avahi-glib-0.6.25-12.19.amzn1.x86_64
    avahi-tools-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-0.6.25-12.19.amzn1.x86_64
    avahi-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-0.6.25-12.19.amzn1.x86_64
    avahi-autoipd-0.6.25-12.19.amzn1.x86_64
    avahi-debuginfo-0.6.25-12.19.amzn1.x86_64
    avahi-libs-0.6.25-12.19.amzn1.x86_64
    avahi-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-0.6.25-12.19.amzn1.x86_64
    avahi-compat-howl-devel-0.6.25-12.19.amzn1.x86_64
    avahi-gobject-devel-0.6.25-12.19.amzn1.x86_64
    avahi-dnsconfd-0.6.25-12.19.amzn1.x86_64
    avahi-glib-devel-0.6.25-12.19.amzn1.x86_64
    avahi-compat-libdns_sd-devel-0.6.25-12.19.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

avahi: before 0.6.25-12.19

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1790.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.



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