Security Bulletin: OpenSSL for IBM i is vulnerable to a denial of service due to a flaw in the BN_mod

Security Bulletin

Summary

OpenSSL is vulnerable to a denial of service due to a flaw in the BN_mod_sqrt() function as described in the vulnerability details section. IBM i has addressed the vulnerability in OpenSSL with a fix as described in the remediation/fixes section.

Vulnerability Details

CVEID: CVE-2022-0778
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a flaw in the BN_mod_sqrt() function when parsing certificates. By using a specially-crafted certificate with invalid explicit curve parameters, a remote attacker could exploit this vulnerability to cause an infinite loop, and results in a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/221911 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 i	7.4
IBM i	7.3
IBM i	7.2

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now.

The issue can be fixed by applying a PTF to IBM i. IBM i releases 7.4, 7.3, and 7.2 will be fixed.

The IBM i PTF number containing the fix for the CVE :

IBM i Release	5733-SC1 PTF Number	PTF Download Link
7.4, 7.3, 7.2	SI79260	Fix Central

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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

14 Apr 2022: 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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

Security Bulletin: OpenSSL for IBM i is vulnerable to a denial of service due to a flaw in the BN_mod_sqrt() function (CVE-2022-0778)