IBM161E93A17C210873A930616B7AA642E8DECB548C126F51ACBF476947F04F5F46Security Bulletin: Vulnerability in Fabric OS firmware used by IBM b-type SAN directors and switches.
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.004 Low
EPSS
Percentile
74.2%
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
Affected configurations
| 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
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.004 Low
EPSS
Percentile
74.2%