Security Bulletin: IBM® Db2® is affected by multiple vulnerabilities in the consumed PCRE library.

Summary

IBM® Db2® is affected by multiple vulnerabilities in the consumed PCRE library.

Vulnerability Details

CVEID:CVE-2015-8383
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling of certain repeated conditional groups. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108464 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8381
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling of patterns with certain group references by the compile_regex function. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108466 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8386
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling of the interaction of lookbehind assertions and mutually recursive subpatterns. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108461 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8388
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling ofpattern and related patterns with an unmatched closing parenthesis. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108459 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8385
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling of pattern and related patterns with certain forward references. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108462 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8387
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow when subroutine calls are mishandled. An attacker could exploit this vulnerability using a specially crafted regular expression to execute arbitrary code on the system or cause a denial of service.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108460 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8391
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by the mishandling of certain nesting by the pcre_compile function. An attacker could exploit this vulnerability using a specially crafted regular expression to execute arbitrary code on the system or cause a denial of service.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108456 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8390
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by the mishandling of substrings in character classes. An attacker could exploit this vulnerability using a specially crafted regular expression to execute arbitrary code on the system or cause a denial of service.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108457 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8393
**DESCRIPTION:**PCRE could allow a remote attacker to obtain sensitive information, caused by the mishandling of the -q option for binary files by pcregrep. An attacker could exploit this vulnerability using a specially crafted file to obtain sensitive information.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108454 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID:CVE-2015-8395
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by the mishandling of certain references. An attacker could exploit this vulnerability using a specially crafted regular expression to execute arbitrary code on the system or cause a denial of service.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108452 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8394
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by the mishandling of digits. An attacker could exploit this vulnerability using a specially crafted regular expression to execute arbitrary code on the system or cause a denial of service.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108453 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-2328
**DESCRIPTION:**PCRE is vulnerable to a denial of service, caused by the improper handling of patterns with certain internal recursive back references. A remote attacker could exploit this vulnerability using a specially crafted regular expression to cause a segmentation fault.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/109276 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:CVE-2015-2327
**DESCRIPTION:**PCRE is vulnerable to a denial of service, caused by the improper handling of patterns with certain recursion. A remote attacker could exploit this vulnerability using a specially crafted regular expression to cause a segmentation fault.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/109275 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:CVE-2020-14155
**DESCRIPTION:**PCRE could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in libpcre. By sending a request with a large number, an attacker could exploit this vulnerability to execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/183499 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID:CVE-2015-8392
**DESCRIPTION:**PCRE is vulnerable to a heap-based buffer overflow, caused by the improper handling of certain instances of the (?| substring. By using a specially crafted regular expression, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 7.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/108455 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Affected Products and Versions

10.5.0.x

|

Client and Server

IBM® Db2®|

11.1.4.x

| Client and Server
IBM® Db2®|

11.5.x

| Client and Server

Linux, Unix platforms are affected. Windows platform is not affected.
Earlier releases (10.1, 9.7 etc.) may also be affected, but they are no longer supported.

Remediation/Fixes

Customers running any vulnerable fixpack level of an affected Program, V10.5, v11.1 and V11.5, 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: V10.5 FP11, V11.1.4 FP7, and V11.5.8. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Special Build for V10.5 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, POWER™ little endian
Linux 64-bit, System z®, System z9® or zSeries®
Solaris 64-bit, SPARC
Solaris 64-bit, x86-64

V11.1| TBD| DT242834|

Special Build for V11.1.4 FP7:

AIX 64-bit
Linux 32-bit, x86-32
Linux 64-bit, x86-64
Linux 64-bit, POWER™ little endian
Linux 64-bit, System z®, System z9® or zSeries®
Solaris 64-bit, SPARC

V11.5| TBD| DT242834|

Special Build for V11.5.0:

AIX 64-bit (for OS7.1)

Special Build for V11.5.8:

AIX 64-bit
Linux 32-bit, x86-32
Linux 64-bit, x86-64
Linux 64-bit, POWER™ little endian
Linux 64-bit, System z®, System z9® or zSeries®

V11.5.9:
<https://www.ibm.com/support/pages/node/7071342&gt;

IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Workarounds and Mitigations

None