Ubuntu update for unrar-nonfree



Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2022-30333
CVE-2022-48579
CVE-2023-40477
CVE-2024-33899
CWE-ID CWE-22
CWE-20
CWE-129
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Public exploit code for vulnerability #3 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

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

libunrar5 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Path traversal

EUVDB-ID: #VU62908

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2022-30333

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences when extracting files from archive. A remote attacker can create a specially crafted archive and overwrite arbitrary files on the system with privileges of the current user.

The vulnerability affects Linux and UNIX systems.

Mitigation

Update the affected package unrar-nonfree to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

unrar (Ubuntu package): before 1:5.6.6-2ubuntu0.1

libunrar5 (Ubuntu package): before 1:5.6.6-2ubuntu0.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7350-1


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?

Yes. This vulnerability is being exploited in the wild.

2) Improper input validation

EUVDB-ID: #VU88639

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-48579

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to improper input validation within the Outside In Core (unrar) component in Oracle Outside In Technology. A local non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.

Mitigation

Update the affected package unrar-nonfree to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

unrar (Ubuntu package): before 1:5.6.6-2ubuntu0.1

libunrar5 (Ubuntu package): before 1:5.6.6-2ubuntu0.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7350-1


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.

3) Improper Validation of Array Index

EUVDB-ID: #VU79711

Risk: High

CVSSv4.0: 7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2023-40477

CWE-ID: CWE-129 - Improper Validation of Array Index

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper validation of array index when processing recovery volumes. A remote attacker can trick the victim to open a specially crafted archive and execute arbitrary code on the system.

Mitigation

Update the affected package unrar-nonfree to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

unrar (Ubuntu package): before 1:5.6.6-2ubuntu0.1

libunrar5 (Ubuntu package): before 1:5.6.6-2ubuntu0.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7350-1


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. However, proof of concept for this vulnerability is available.

4) Input validation error

EUVDB-ID: #VU92077

Risk: Low

CVSSv4.0: 0.2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-33899

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service or spoofing attack.

The vulnerability exists due to insufficient validation of ANSI escape sequences within the CLI interface. A remote attacker can pass specially crafted input via CLI and spoof the archive output or perform a denial of service (DoS) attack.

Note, the vulnerability affects Linux and Unix installations only.

Mitigation

Update the affected package unrar-nonfree to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

unrar (Ubuntu package): before 1:5.6.6-2ubuntu0.1

libunrar5 (Ubuntu package): before 1:5.6.6-2ubuntu0.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7350-1


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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