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             AUSCERT External Security Bulletin Redistribution

        Security Bulletin: IBM Data Server Driver for JDBC and SQLJ
             is affected by a 3rd party Unsafe deserialization
                                6 July 2018


        AusCERT Security Bulletin Summary

Product:           IBM Data Server Driver for JDBC and SQLJ
Publisher:         IBM
Operating System:  AIX
                   Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1677  

Reference:         ESB-2018.0790.2

Original Bulletin: 

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Security Bulletin: Security Bulletin: IBM Data Server Driver for JDBC and SQLJ
is affected by a 3RD PARTY Unsafe deserialization

Security Bulletin

Document information
Software version: 9.5, 9.7, 10.1, 10.5, 11.1
Operating system(s): AIX, HP-UX, Linux, Solaris, Windows
Software edition: Advanced Enterprise Server, Advanced Workgroup Server,
Enterprise Server, Express, Express-C, Personal, Workgroup Server

Reference #: 2012479

Modified date: 05 July 2018


Unsafe deserialization in DB2 JDBC driver

Vulnerability Details

The Db2 JDBC driver deserializes the contents of /tmp/connlicj.bin (default
path, this is configurable), which leads to object injection and potentially
arbitrary code execution depending on the classpath.

CVEID: CVE-2017-1677
DESCRIPTION: IBM Data Server Driver for JDBC and SQLJ deserializes the contents
of /tmp/connlicj.bin which leads to object injection and potentially arbitrary
code execution depending on the classpath.
CVSS Base Score: 7.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
133999 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

DB2Connect 9.5

DB2Connect 9.7

DB2Connect 10.1

DB2Connect 10.5

DB2Connect 11.1


|  Product   |     VRMF      | APAR  |       Remediation / First Fix        |
|DB2Connect  |V11.1 M2FP2 SB |IT23592|JCC version 3.72.41/4.23.48           |
|            |               |       |See workaround or contact support     |
|DB2Connect  |V10.5 FP9 SB   |IT23591|JCC version 3.69.75/4.19.76           |
|            |               |       |See workaround or contact support     |
|DB2Connect  |V10.1 FP6 SB   |IT23590|JCC version 3.65.138/4.15.147         |
|            |               |       |See workaround or contact support     |
|DB2Connect  |V9.7 FP11 SB   |IT23575|JCC version 3.64.142/4.14.147         |
|            |               |       |See workaround or contact support     |
|DB2Connect  |V9.5 FP10 SB   |IT23575|JCC version 3.64.142/4.14.147         |
|            |               |       |See workaround or contact support     |

Workarounds and Mitigations

Workaround is to Set db2.jcc.outputDirectory property to a secure location so
that driver will write the cache file to the configured location which can not
accessed without proper authentication.
Or use the above Special build drivers.

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