Ubuntu update for busybox



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2022-48174
CVE-2023-42363
CVE-2023-42364
CVE-2023-42365
CWE-ID CWE-787
CWE-416
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

busybox-static (Ubuntu package)
Operating systems & Components / Operating system package or component

busybox-initramfs (Ubuntu package)
Operating systems & Components / Operating system package or component

busybox (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU80391

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-48174

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input ash.c. A remote attacker can send specially crafted data to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected package busybox to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.10

busybox-static (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox-initramfs (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox (Ubuntu package): before 1:1.30.1-4ubuntu6.5

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6961-1


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) Use-after-free

EUVDB-ID: #VU93460

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-42363

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the xasprintf() function in xfuncs_printf.c. A remote attacker can trick the victim to pass a specially crafted input to the application and crash it.

Mitigation

Update the affected package busybox to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.10

busybox-static (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox-initramfs (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox (Ubuntu package): before 1:1.30.1-4ubuntu6.5

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6961-1


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) Use-after-free

EUVDB-ID: #VU93459

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-42364

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the evaluate() function in awk.c. A remote attacker can trick the victim to pass a specially crafted awk pattern to the application and crash it.

Mitigation

Update the affected package busybox to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.10

busybox-static (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox-initramfs (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox (Ubuntu package): before 1:1.30.1-4ubuntu6.5

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6961-1


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.

4) Use-after-free

EUVDB-ID: #VU93458

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-42365

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the copyvar() function in awk.c. A remote attacker can trick the victim to pass a specially crafted awk pattern to the application and crash it.


Mitigation

Update the affected package busybox to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.10

busybox-static (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox-initramfs (Ubuntu package): before 1:1.30.1-4ubuntu6.5

busybox (Ubuntu package): before 1:1.30.1-4ubuntu6.5

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6961-1


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.



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