IBM161E93A17C210873A930616B7AA642E8DECB548C126F51ACBF476947F04F5F46Security Bulletin: Vulnerability in Fabric OS firmware used by IBM b-type SAN directors and switches.
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.004 Low
EPSS
Percentile
73.8%
Summary
Public disclosed vulnerability from OpenSSL in the Fabric OS (FOS) used by IBM b-type SAN directors and switches.
Vulnerability Details
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) |
|---|---|
| FOS | 7.X prior to 7.4.2j |
| FOS |
9.1.X prior to 9.1.0b
9.0.X prior to 9.0.1e
FOS| 8.X prior to 8.2.3c
Remediation/Fixes
| Product | VRMF | Fix |
|---|---|---|
| FOS | 9.1.0b | <https://www.ibm.com/support/pages/node/6371270> |
| FOS | 9.0.1e |
<https://www.ibm.com/support/pages/node/6371270>
FOS| 8.2.3c|
https://www.ibm.com/support/pages/ibm-san-b-type-firmware-version-8x-qualification
FOS| 7.4.2j|
<https://www.ibm.com/support/pages/ibm-san-b-type-firmware-version-7x-qualification>
Workarounds and Mitigations
| CPE | Name | Operator | Version |
|---|---|---|---|
| fos 7.x prior to | eq | 7.4.2j | |
| fos 9.1.x prior to 9.1.0b 9.0.x prior to | eq | 9.0.1e | |
| fos 8.x prior to | eq | 8.2.3c |
Related
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.004 Low
EPSS
Percentile
73.8%