Amazon Linux AMI update for dbus-broker



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-31212
CVE-2022-31213
CWE-ID CWE-125
CWE-476
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

dbus-broker
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU67527

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2022-31212

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary condition when parsing DBus service Exec line in c-uitl/c-shquote. A local user can pass specially crafted input to the service, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    dbus-broker-debuginfo-32-1.amzn2023.0.2.aarch64
    dbus-broker-32-1.amzn2023.0.2.aarch64
    dbus-broker-debugsource-32-1.amzn2023.0.2.aarch64

src:
    dbus-broker-32-1.amzn2023.0.2.src

x86_64:
    dbus-broker-debuginfo-32-1.amzn2023.0.2.x86_64
    dbus-broker-debugsource-32-1.amzn2023.0.2.x86_64
    dbus-broker-32-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

dbus-broker: before 32-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-080.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. However, proof of concept for this vulnerability is available.

2) NULL pointer dereference

EUVDB-ID: #VU67528

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2022-31213

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: Yes

Description

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

The vulnerability exists due to a NULL pointer dereference error when handling a malformed XML config file. A local user can supply a specially crafted XML file to the service and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    dbus-broker-debuginfo-32-1.amzn2023.0.2.aarch64
    dbus-broker-32-1.amzn2023.0.2.aarch64
    dbus-broker-debugsource-32-1.amzn2023.0.2.aarch64

src:
    dbus-broker-32-1.amzn2023.0.2.src

x86_64:
    dbus-broker-debuginfo-32-1.amzn2023.0.2.x86_64
    dbus-broker-debugsource-32-1.amzn2023.0.2.x86_64
    dbus-broker-32-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

dbus-broker: before 32-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-080.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. However, proof of concept for this vulnerability is available.



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