Multiple vulnerabilities in IBM DB2

Published: 2018-12-03

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-1711 CVE-2018-1857
CWE-ID	CWE-119 CWE-200
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	IBM DB2 Server applications / Database software
Vendor	IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Privilege escalation

EUVDB-ID: #VU16208

Risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1711

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local unauthenticated attacker to gain elevated privileges on the target system.

The vulnerability exists due to unspecified flaw. A local attacker can modify the contents of the control tables used by the ATS to permit unauthorized access to authorizations held by other users as well as RCAC row permissions and column masks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM DB2: 9.7.0.0 - 11.1.3.3 iFix002

External links

http://www-01.ibm.com/support/docview.wss?uid=ibm10729983

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Information disclosure

EUVDB-ID: #VU16209

Risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1857

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to Db2's Row and Column Access Control (RCAC) rules are not being enforced when creating a table using AS (CTAS) sub-select statements. A local attacker can create a table using AS (CTAS) sub-select statements to bypass Row and Column Access Control (RCAC) rules when using the 'WITH DATA' clause to select and insert data, allowing a user to bypass FGAC access controls and gain access important data.

Mitigation

Update to version 11.1.4.4.