Security Bulletin: Vulnerabilities in Perl component shipped with IBM Rational ClearCase (CVE-2015-8608, CVE-2015-8853, CVE-2016-2381)

Summary

IBM Rational ClearCase is affected by vulnerabilities in the Perl interpreter.

Vulnerability Details

CVEID: CVE-2015-8608**
DESCRIPTION:** Perl could allow a remote attacker to execute arbitrary code on the system, caused by an out-of-bounds read in the VDir::MapPathA and VDir::MapPathW functions. An attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112127 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2015-8853**
DESCRIPTION:** Perl is vulnerable to a denial of service, caused by the improper handling of illegal inputs. An attacker could exploit this vulnerability using regular expression on malformed UTF8 input to cause the application to enter into an infinite loop and consume all available CPU resources.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112536 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-2381**
DESCRIPTION:** Perl could allow a remote attacker to bypass security restrictions, caused by improper handling of $ENV{“X”} variable. By using duplicate environment variables in envp, an attacker could exploit this vulnerability to bypass the taint protection mechanism.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112139 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

IBM Rational ClearCase versions:

Version

|

Status

—|—

9.0 through 9.0.0.3

|

Affected

8.0.1 through 8.0.1.13

|

Affected

8.0 through 8.0.0.20

|

Affected

7.1 through 7.1.2.19 (all releases and fix packs)

|

Affected

You may be vulnerable if you use your own perl scripts executed by the ratlperl interpreter shipped with Rational ClearCase, and those scripts use one of the vulnerable parts of perl.

Remediation/Fixes

The solution is to upgrade to a fix pack of ClearCase that has a fix in ratlperl.

Affected Versions

|

** Applying the fix**

—|—

9.0 through 9.0.0.3

| Install Rational ClearCase Fix Pack 4 (9.0.0.4) for 9.0

8.0.1 through 8.0.1.13
8.0 through 8.0.0.20

| Install Rational ClearCase Fix Pack 14 (8.0.1.14) for 8.0.1

7.1 through 7.1.2.19 (all releases and fix packs)

| Customers on extended support contracts should contact Customer Support for information.
For 7.0, 7.1 and earlier releases, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

None