Security Bulletin: IBM Streams may be affected by XMLsoft Libxml2 vulnerabilities

Summary

The libxml2 library, used by IBM Streams may have security vulnerabilities. IBM Streams has addressed the applicable CVEs.

Vulnerability Details

CVEID: CVE-2017-9050**
DESCRIPTION:** libxml2 is vulnerable to a heap-based buffer overflow, caused by a buffer over-read flaw in the xmlDictAddString function in dict.c. By sending a specially-crafted request, a local attacker could overflow a buffer and cause the application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126277 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2017-9049**
DESCRIPTION:** libxml2 is vulnerable to a heap-based buffer overflow, caused by a buffer over-read flaw in the xmlDictComputeFastKey function in dict.c. By sending a specially-crafted request, a local attacker could overflow a buffer and cause the application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126276 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2017-9048**
DESCRIPTION:** libxml2 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking of the strlen(buf) size in the xmlSnprintfElementContent function in valid.c. By sending a specially-crafted request, a local attacker could overflow a buffer and cause the application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126275 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2017-9047**
DESCRIPTION:** libxml2 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the xmlSnprintfElementContent function in valid.c. By sending a specially-crafted request, a local attacker could overflow a buffer and cause application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/126274 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2017-8872**
DESCRIPTION:** libxml2 is vulnerable to a buffer overflow, caused by a a buffer-over-read flaw in the htmlParseTryOrFinish function in HTMLparser.c. By sending a specially-crafted request, a local attacker could overflow a buffer and cause a denial of service condition or obtain sensitive information on the system.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/125890 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Affected Products and Versions

The following versions may be impacted:

• IBM Streams Version 4.2.1.2 and earlier
• IBM InfoSphere Streams Version 4.1.1.4 and earlier
• IBM InfoSphere Streams Version 4.0.1.4 and earlier
• IBM InfoSphere Streams Version 3.2.1.6 and earlier
• IBM InfoSphere Streams Version 3.1.0.8 and earlier
• IBM InfoSphere Streams Version 3.0.0.6 and earlier

Remediation/Fixes

NOTE: Fix Packs are available on IBM Fix Central.

To remediate/fix this issue, follow the instructions below:

• Version 4.2.x: Apply 4.2.1 Fix Pack 3 (4.2.1.3) or higher.
• Version 4.1.x: Apply 4.1.1 Fix Pack 5 (4.1.1.5) or higher.
• Version 4.0.x: Apply 4.0.1 Fix Pack 5 (4.0.1.5) or higher.
• Versions 3.2.x, 3.1.x, and 3.0.x: For versions earlier than 4.x.x, IBM recommends upgrading to a fixed, supported version/release/platform of the product. Customers who cannot upgrade and need to secure their installation should open a PMR with IBM Technical Support and request assistance securing their InfoSphere Streams system against the vulnerabilities identified in this Security Bulletin.

Workarounds and Mitigations

None