Security Bulletin: Multiple libarchive vulnerabilities affect Watson Explorer

Summary

Multiple libarchive vulnerabilities affect Watson Explorer.

Vulnerability Details

CVEID: CVE-2015-8915 DESCRIPTION: libarchive is vulnerable to a denial of service, caused by an invalid memory read in CPIO parser. By reading a specially-crafted CPIO file, a remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114249 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:L)

CVEID: CVE-2015-8923 DESCRIPTION: libarchive is vulnerable to a denial of service, caused by an error in the ZIP parser. A remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114257 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:L)

CVEID: CVE-2015-8924 DESCRIPTION: libarchive is vulnerable to a heap-based buffer overflow, caused by an out of bounds read error in TAR parser. By persuading a victim to open a specially-crafted TAR file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114258 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CVEID: CVE-2015-8920 DESCRIPTION: libarchive is vulnerable to a stack-based buffer overflow, caused by an out of bounds read error in ar parser. By persuading a victim to open a specially-crafted ar file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114254 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CVEID: CVE-2015-8929 DESCRIPTION: libarchive is vulnerable to a denial of service, caused by an error in __archive_read_get_extract in TAR parser. An remote attacker could exploit this vulnerability to cause a memory leak resulting in a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114264 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:L)

CVEID: CVE-2015-8930 DESCRIPTION: libarchive is vulnerable to a denial of service, caused by an error in ISO parser. A remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114265 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:L)

CVEID: CVE-2015-8927 DESCRIPTION: libarchive is vulnerable to a heap-based buffer overflow, caused by an out of bounds read error in trad_enc_decrypt_update() function. By reading password for a specially-crafted ZIP file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114261 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-2015-8932 DESCRIPTION: libarchive is vulnerable to a denial of service, caused by an shiftleft error in compress_bidder_init in TAR parser. A remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114267 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:L)

CVEID: CVE-2015-8933 DESCRIPTION: libarchive could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in archive_read_format_tar_skip() in TAR parser. An attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/114268 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-2016-1541 DESCRIPTION: libarchive is vulnerable to a heap-based buffer overflow. By persuading a victim to unzip a specially-crafted zip file, a remote attacker could overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 6.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/112828 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

Affected Products and Versions

This vulnerability applies to the following products and versions:

• Watson Explorer Foundational Components versions 11.0.0.0 - 11.0.1
• Watson Explorer Foundational Components versions 10.0.0.0 - 10.0.0.2

Remediation/Fixes

Follow these steps to upgrade to the required version of libarchive.
The table reflects product names at the time the specified versions were released. To use the link to Fix Central in this table, you must first log in to the IBM Support: Fix Central site at <http://www.ibm.com/support/fixcentral/&gt;.

1. If not already installed, upgrade to version 11.0.1. See Upgrading to Watson Explorer Foundational Components Version 11.0.1 for upgrade instructions and Watson Explorer 11.0.1 Foundational Components for download information and instructions.
2. Download the 11.0.1 interim fix for your edition of Watson Explorer from Fix Central.
3. Place the interim fix zip or tar file at the root of the Watson Explorer Engine installation directory.
   Default locations:
   Linux: /opt/ibm/WEX/Engine``
   Windows: \Program Files\IBM\WEX\Engine
4. Run Engine/bin/velocity-shutdown[.exe]
5. Extract all files from the archive file. Agree to all overwrites.
6. Linux users should change ownership on all Engine subdirectories to their Apache user and Apache user group by running chown -R apache:apache *
7. Run Engine/bin/velocity-startup[.exe]
   Watson Explorer Foundational Components| 10.0.0.0 - 10.0.0.2| Upgrade to Version 10.0.0.3

See Watson Explorer Version 10.0.0.3 Foundational Components for download information and instructions.

Note: For SUSE Linux 11 contact IBM Support for more information.

Workarounds and Mitigations

None