IBM Support

Security Bulletin: OpenSSL for IBM i is vulnerable to denial of service attacks and the ability for remote attacker to obtain sensitive information due to multiple vulnerabilities.

Security Bulletin


Summary

OpenSSL for IBM i is vulnerable to a denial of service caused by error in certificate verification (CVE-2023-0464), a denial of service caused by arbitrary pointers to memcmp (CVE-2023-0286), denial of service caused by a double-free error (CVE-2022-4450), denial of service caused by use-after-free error (CVE-2023-0215), and the ability for a remote attack to obtain sensitive information caused by a timing-based side channel in RSA decryption (CVE-2022-4304) as described in the vulnerability details section. IBM i has addressed the vulnerabilities in OpenSSL with a fix as described in the remediation/fixes section.

Vulnerability Details

CVEID:   CVE-2023-0464
DESCRIPTION:   OpenSSL is vulnerable to a denial of service, caused by an error related to the verification of X.509 certificate chains that include policy constraints. By creating a specially crafted certificate chain that triggers exponential use of computational resources, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/250736 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:   CVE-2023-0286
DESCRIPTION:   OpenSSL is vulnerable to a denial of service, caused by a type confusion error related to X.400 address processing inside an X.509 GeneralName. By passing arbitrary pointers to a memcmp call, a remote attacker could exploit this vulnerability to read memory contents or cause a denial of service.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/246611 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)

CVEID:   CVE-2022-4450
DESCRIPTION:   OpenSSL is vulnerable to a denial of service, caused by a double-free error related to the improper handling of specific PEM data by the PEM_read_bio_ex() function. By sending specially crafted PEM files for parsing, a remote attacker could exploit this vulnerability to cause the system to crash.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/246615 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2022-4304
DESCRIPTION:   OpenSSL could allow a remote attacker to obtain sensitive information, caused by a timing-based side channel in the RSA Decryption implementation. By sending an overly large number of trial messages for decryption, an attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/246612 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2023-0215
DESCRIPTION:   OpenSSL is vulnerable to a denial of service, caused by a use-after-free error related to the incorrect handling of streaming ASN.1 data by the BIO_new_NDEF function. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/246614 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM i7.5
IBM i7.4
IBM i7.3
IBM i7.2

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i.  IBM i releases 7.5, 7.4, 7.3, and 7.2 will be fixed.
 
The IBM i PTF numbers for OpenSSL in 5733-SC1 contain the fixes for the vulnerabilities.
IBM i Release5733-SC1
PTF Number
PTF Download Link
7.5SI83245https://www.ibm.com/support/pages/ptf/SI83245
7.4, 7.3, 7.2SI83194https://www.ibm.com/support/pages/ptf/SI83194
 
https://www.ibm.com/support/fixcentral

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Change History

09 May 2023: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSC5L9","label":"IBM i 7.2 Preventative Service Planning"},"Component":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.2.0","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSB23CE","label":"IBM i 7.5 Preventative Service Planning"},"Component":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.5.0","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SS9QQS","label":"IBM i 7.4 Preventative Service Planning"},"Component":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.4.0","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SWG60","label":"IBM i"},"Component":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.5.0,7.4.0, 7.3.0, 7.2.0","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSTS2D","label":"IBM i 7.3 Preventative Service Planning"},"Component":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.3.0","Edition":"","Line of Business":{"code":"LOB57","label":"Power"}}]

Document Information

Modified date:
09 May 2023

UID

ibm16989163