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AUSCERT External Security Bulletin Redistribution
ESB-2020.2257.2
IBM Db2 may be vulnerable to a Denial of Service attack (CVE-2020-4355)
8 December 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Db2
Publisher: IBM
Operating System: AIX
Linux variants
Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020.4355
Original Bulletin:
https://www.ibm.com/support/pages/node/6242350
Revision History: December 8 2020: Vendor added URLs for updates to advisory
July 1 2020: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
IBM Db2 may be vulnerable to a Denial of Service attack (CVE-2020-4355)
Document Information
Document number : 6242350
Modified date : 07 December 2020
Product : DB2 for Linux- UNIX and Windows
Software version : 9.7,10.1,10.5,11.1,11.5
Operating system(s): AIX
Linux
Windows
Security Bulletin
Summary
IBM Db2 is vulnerable to a denial of service, caused by improper handling of
Secure Sockets Layer (SSL) renegotiation requests. By sending specially-crafted
requests, a remote attacker could exploit this vulnerability to increase the
resource usage on the system.
Vulnerability Details
CVEID: CVE-2020-4355
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
is vulnerable to a denial of service, caused by improper handling of Secure
Sockets Layer (SSL) renegotiation requests. By sending specially-crafted
requests, a remote attacker could exploit this vulnerability to increase the
resource usage on the system.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
178507 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Affected Products and Versions
All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, V11.1, and V11.5 editions on
all platforms are affected.
Remediation/Fixes
Customers running any vulnerable fixpack level of an affected Program 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: V9.7 FP11, V10.1 FP6, V10.5 FP11, 11.1 FP5,
and V11.5 GA. They can be applied to any affected fixpack level of the
appropriate release to remediate this vulnerability.
+-------+----------------+-------+--------------------------------------------+
|Release|Fixed in fix |APAR |Download URL |
| |pack | | |
+-------+----------------+-------+--------------------------------------------+
|V9.7 |TBD |IT32780|Special Build for V9.7 FP11: |
| | | | |
| | | |AIX 64-bit |
| | | |HP-UX 64-bit |
| | | |Linux 32-bit, x86-32 |
| | | |Linux 64-bit, x86-64 |
| | | |Linux 64-bit, POWER big endian |
| | | |Linux 64-bit, System z, System z9 or zSeries|
| | | |Solaris 64-bit, SPARC |
| | | |Solaris 64-bit, x86-64 |
| | | |Windows 32-bit, x86 |
| | | |Windows 64-bit, x86 |
+-------+----------------+-------+--------------------------------------------+
|V10.1 |TBD |IT32779|Special Build for V10.1 FP6: |
| | | | |
| | | |AIX 64-bit |
| | | |HP-UX 64-bit |
| | | |Linux 32-bit, x86-32 |
| | | |Linux 64-bit, x86-64 |
| | | |Linux 64-bit, POWER big endian |
| | | |Linux 64-bit, System z, System z9 or zSeries|
| | | |Solaris 64-bit, SPARC |
| | | |Solaris 64-bit, x86-64 |
| | | |Windows 32-bit, x86 |
| | | |Windows 64-bit, x86 |
+-------+----------------+-------+--------------------------------------------+
|V10.5 |TBD |IT32778|Special Build for V10.5 FP11: |
| | | | |
| | | |AIX 64-bit |
| | | |HP-UX 64-bit |
| | | |Linux 32-bit, x86-32 |
| | | |Linux 64-bit, x86-64 |
| | | |Linux 64-bit, POWER big endian |
| | | |Linux 64-bit, POWER little endian |
| | | |Linux 64-bit, System z, System z9 or zSeries|
| | | |Solaris 64-bit, SPARC |
| | | |Solaris 64-bit, x86-64 |
| | | |Windows 32-bit, x86 |
| | | |Windows 64-bit, x86 |
| | | |Inspur |
+-------+----------------+-------+--------------------------------------------+
|V11.1 |TBD |IT32777|Special Build for V11.1 FP5: |
| | | | |
| | | |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|
| | | |Solaris 64-bit, SPARC |
| | | |Windows 32-bit, x86 |
| | | |Windows 64-bit, x86 |
+-------+----------------+-------+--------------------------------------------+
|V11.5 |TBD |IT32766|Build for V11.5.4 GA: |
| | | | |
| | | |https://www.ibm.com/support/pages/node/ |
| | | |6241724 |
+-------+----------------+-------+--------------------------------------------+
Workarounds and Mitigations
None
Change History
7 December 2020: Updated Windows 64-bit image for 9.7
26 November 2020: Windows images for 9.7 updated
9 October 2020: Linux/Unix images for 9.7 refreshed
18 August 2020: Windows images for 9.7 refreshed
30 June 2020: Initial Publication
Document Location
Worldwide
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