Security Bulletin: OpenSSL for IBM i is affected by CVE-2021-23840 and CVE-2021-23841

2021-03-1219:31:53

www.ibm.com

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

JSON

Summary

OpenSSL is used by IBM i. IBM i has addressed the applicable CVEs.

Vulnerability Details

CVEID:CVE-2021-23840
**DESCRIPTION:**OpenSSL is vulnerable to a denial of service, caused by an integer overflow in CipherUpdate. By sending an overly long argument, an attacker could exploit this vulnerability to cause the application to crash.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/196848 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-2021-23841
**DESCRIPTION:**OpenSSL is vulnerable to a denial of service, caused by a NULL pointer dereference in the X509_issuer_and_serial_hash() function. By parsing the issuer field, an attacker could exploit this vulnerability to cause the application to crash.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/196847 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
IBM i	7.1

Remediation/Fixes

The issues can be fixed by applying a PTF to IBM i. Releases 7.4 7.3, 7.2 and 7.1 of IBM i are supported and will be fixed.

The IBM i PTF numbers are:
Release 7.1 – SI75593 Release 7.2, 7.3, & 7.4 – SI75594
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.