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AUSCERT External Security Bulletin Redistribution
ESB-2019.3824
Security Bulletin: IBM Sterling Connect:Express for UNIX FTP Server is
Affected by a BBS Overflow Vulnerability (CVE-2019-4599)
15 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Sterling Connect:Express for UNIX
Publisher: IBM
Operating System: Linux variants
AIX
Solaris
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4599
Original Bulletin:
https://www.ibm.com/support/pages/node/1078431
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Security Bulletin: IBM Sterling Connect:Express for UNIX FTP Server is
Affected by a BBS Overflow Vulnerability (CVE-2019-4599)
Document Information
Product : Sterling Connect:Express for UNIX
Component : FTP Server
Software version : 1.5.0
Operating system(s): AIX
Linux
Solaris
Reference # : 1078431
Modified date : 14 October 2019
Summary
IBM Sterling Connect:Express for UNIX is vulnerable to a heap-based buffer
overflow, caused by improper bounds checking in the FTP service. A remote
attacker could overflow a buffer and execute arbitrary commands or cause a
denial of service.
Vulnerability Details
CVE-ID: CVE-2019-4599
Description: ALLO function call does not require authentication and allows
storing data within a static buffer located in the BSS section - rem_file. The
total size of input datais not enforced, leading the program to make operate a
full copy inside this limited size buffer.
CVSS Base Score: 8.4
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/
167882 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products and Versions
IBM Sterling Connect:Express for UNIX 1.5.0.16
o All versions prior to 1.5.0.15 iFix 150-1601
Remediation/Fixes
+--------+----+--------------------------------------------------------+
| VRMF |APAR| Remediation/First Fix |
+--------+----+--------------------------------------------------------+
|1.5.0.16|None|Apply 1.5.0.15 iFix 150-1602, available on Fix Central .|
+--------+----+--------------------------------------------------------+
Workarounds and Mitigations
None
Change History
14 October 2019: Original document published
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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