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)

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

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&gt;

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