Security Bulletin
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 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 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 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 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.
| Release | Fixed in fix pack | APAR | Download URL |
| V9.7 | TBD | Special Build for V9.7 FP11:
AIX 64-bit |
|
| V10.1 | TBD | Special Build for V10.1 FP6:
AIX 64-bit |
|
| V10.5 | FP11 | ||
| V11.1 | FP4 |
Workarounds and Mitigations
None.
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References
Acknowledgement
The vulnerabilities were reported to IBM by Eddie Zhu, BEIJING DBSEC TECHNOLOGY CO., LTD.
Change History
November 5, 2018: Original version published.
November 28, 2018: Updated 11.1 version with a link to 11.1.4.4 image.
March 6, 2020: Updated 10.5 version with a link to 10.5 FP11 image.
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
06 March 2020
UID
ibm10733939