Security Bulletin: IBM® Db2® is affected by multiple privilege escalation vulnerabilities (CVE-2018-1799, CVE-2018-1780, CVE-2018-1781, CVE-2018-1834).

Summary

Db2 is vulnerable to privilege escalation by exploiting multiple symbolic link attacks, which could allow the Db2 instance owner or DAS owner to obtain root access.

Vulnerability Details

CVEID: CVE-2018-1799 DESCRIPTION: IBM DB2 could allow a local unprivileged user to overwrite files on the system which could cause damage to the database.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/149429&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

CVEID: CVE-2018-1780 DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local db2 instance owner to obtain root access by exploiting a symbolic link attack to read/write/corrupt a file that they originally did not have permission to access.
CVSS Base Score: 7.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148803&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-1781 DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to obtain root access by exploiting a symbolic link attack to read/write/corrupt a file that they originally did not have permission to access.
CVSS Base Score: 8.4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148804&gt; for the current score
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)

CVEID: CVE-2018-1834 DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) contains a vulnerability that could allow a local user to escalate their privileges to root through a symbolic link attack.
CVSS Base Score: 7.4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150511&gt; 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

All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, and V11.1 editions on all platforms except Windows are affected. Windows platforms are not affected.

Remediation/Fixes

The recommended solution is to apply the appropriate fix for this vulnerability.

FIX:

The fix for DB2 release V11.1 is in V11.1.4.4, available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7, V10.1, and V10.5, 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: DB2 V9.7 FP11, V10.1 FP6, and V10.5 FP10. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

IT26142
IT26135
IT26141
IT26318

| 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

V10.1 | TBD |

IT26140
IT26134
IT26139
IT26317

| 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

V10.5 | FP11 |

IT26137
IT26133
IT26136
IT26316

|

<https://www.ibm.com/support/pages/node/3500079&gt;

V11.1 | FP4 |

IT26131
IT26129
IT26130
IT26315

|

<http://www.ibm.com/support/docview.wss?uid=ibm10741687&gt;

Workarounds and Mitigations

None.