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
EPSS
Percentile
41.0%
IBM® Db2® is vulnerable to a denial of service as the server may crash when when attempting to use ACR client affinity for unfenced DRDA federation wrappers.
CVEID:CVE-2023-27555
**DESCRIPTION:**IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a denial of service when attempting to use ACR client affinity for unfenced DRDA federation wrappers.
CVSS Base score: 5.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/249187 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
All fix pack levels of IBM Db2 V11.5 server editions on all platforms are affected.
IBM Db2 V11.1 and 10.5 are not affected.
Customers running any vulnerable fixpack level of an affected Program, V11.5, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent fixpack level for each impacted release: v11.5.7 and V11.5.8. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.
Release | Fixed in fix pack | APAR | Download URL |
---|---|---|---|
V11.5 | TBD | DT188887 |
Special Build for V11.5.7:
AIX 64-bit
Linux 32-bit, x86-32
Linux 64-bit, x86-64
Linux 64-bit, POWER™ little endian
Linux 64-bit, System z®, System z9® or zSeries®
Windows 32-bit, x86
Windows 64-bit, x86
Special Build for V11.5.8:
AIX 64-bit
Linux 32-bit, x86-32
Linux 64-bit, x86-64
Linux 64-bit, POWER™ little endian
Linux 64-bit, System z®, System z9® or zSeries®
Windows 32-bit, x86
Windows 64-bit, x86
IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.
Remove the unsupported options from the db2dsdriver.cfg configuration for the federated data source. If the configuration cannot be changed because it shared with other applications then provide a separate configuration for the federated data source.
Vendor | Product | Version | CPE |
---|---|---|---|
ibm | db2_for_linux\,_unix_and_windows | 11.5 | cpe:2.3:a:ibm:db2_for_linux\,_unix_and_windows:11.5:*:*:*:*:*:*:* |
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
EPSS
Percentile
41.0%