Ubuntu update for openssl



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2022-3996
CVE-2023-0464
CVE-2023-0465
CVE-2023-0466
CWE-ID CWE-667
CWE-400
CWE-347
CWE-254
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

libssl1.1 (Ubuntu package)
Operating systems & Components / Operating system package or component

libssl3 (Ubuntu package)
Operating systems & Components / Operating system package or component

libssl-doc (Ubuntu package)
Operating systems & Components / Operating system package or component

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

openssl1.0 (Ubuntu package)
Operating systems & Components / Operating system package or component

libssl1.0.0 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Improper locking

EUVDB-ID: #VU70142

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-3996

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to double-locking error if an X.509 certificate contains a malformed policy constraint and policy processing is enabled. A remote attacker can under certain circumstances perform a denial of service attack against the web server.

Successful exploitation of the vulnerability requires that policy processing being enabled on the server.

Mitigation

Update the affected package openssl to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.04

libssl1.1 (Ubuntu package): before 1.1.1f-1ubuntu2.18

libssl3 (Ubuntu package): before 3.0.2-0ubuntu1.9

libssl-doc (Ubuntu package): before Ubuntu Pro

openssl (Ubuntu package): before Ubuntu Pro

openssl1.0 (Ubuntu package): before 1.0.2n-1ubuntu5.12

libssl1.0.0 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6039-1


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) Resource exhaustion

EUVDB-ID: #VU73960

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-2023-0464

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when verifying X.509 certificate chains that include policy constraints. A remote attacker can create a specially crafted certificate to trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package openssl to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.04

libssl1.1 (Ubuntu package): before 1.1.1f-1ubuntu2.18

libssl3 (Ubuntu package): before 3.0.2-0ubuntu1.9

libssl-doc (Ubuntu package): before Ubuntu Pro

openssl (Ubuntu package): before Ubuntu Pro

openssl1.0 (Ubuntu package): before 1.0.2n-1ubuntu5.12

libssl1.0.0 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6039-1


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) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU74148

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0465

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to an error when validating certificate policies in leaf certificates. A remote attacker that controls a malicious CA server can issue a certificate that will be validated by the application.

Mitigation

Update the affected package openssl to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.04

libssl1.1 (Ubuntu package): before 1.1.1f-1ubuntu2.18

libssl3 (Ubuntu package): before 3.0.2-0ubuntu1.9

libssl-doc (Ubuntu package): before Ubuntu Pro

openssl (Ubuntu package): before Ubuntu Pro

openssl1.0 (Ubuntu package): before 1.0.2n-1ubuntu5.12

libssl1.0.0 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6039-1


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) Security features bypass

EUVDB-ID: #VU74149

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0466

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to an error within the X509_VERIFY_PARAM_add0_policy() function, which does not perform the certificate policy check despite being implicitly enabled. A remote attacker can bypass expected security restrictions and perform MitM attack.

Mitigation

Update the affected package openssl to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 23.04

libssl1.1 (Ubuntu package): before 1.1.1f-1ubuntu2.18

libssl3 (Ubuntu package): before 3.0.2-0ubuntu1.9

libssl-doc (Ubuntu package): before Ubuntu Pro

openssl (Ubuntu package): before Ubuntu Pro

openssl1.0 (Ubuntu package): before 1.0.2n-1ubuntu5.12

libssl1.0.0 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6039-1


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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