Security Bulletin: IBM Dynamic System Analysis (DSA) Preboot is affected by vulnerabilities in curl

Summary

IBM Dynamic System Analysis (DSA) Preboot has addressed the following vulnerabilities in curl.

Vulnerability Details

Summary

IBM Dynamic System Analysis (DSA) Preboot has addressed the following vulnerabilities in curl.

Vulnerability Details:

CVEID: CVE-2016-7167

Description: libcurl could allow a local attacker to execute arbitrary code on the system, caused by an integer overflow in the curl_escape(), curl_easy_escape(), curl_unescape(), and curl_easy_unescape() functions. By sending an overly long string, an attacker could exploit this vulnerability to execute arbitrary code on the system.

CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/116938&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2016-8615

Description: cURL/libcurl is vulnerable to cookie injection, caused by an error related to fgets() function. By using a malicious server that sends a very long cookie name and value, a remote attacker could exploit this vulnerability to inject a malicious cookie for arbitrary domains.

CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118632&gt; 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)

CVEID: CVE-2016-8616

Description: cURL/libcurl could allow a remote attacker to bypass security restrictions, caused by the use of case insensitive comparisons. By using valid credentials exists for a protocol which supports connection-scoped credentials, an attacker could exploit this vulnerability to cause a connection to be reused.

CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118633&gt; 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)

CVEID: CVE-2016-8617

Description: cURL/libcurl could allow a remote authenticated attacker to execute arbitrary code on the system, caused by an out of bounds write in the base64 encode function. By using a specially crafted username, an attacker could exploit this vulnerability to execute arbitrary code on the system.

CVSS Base Score: 5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118636&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2016-8618

Description: cURL/libcurl could allow a remote attacker to execute arbitrary code on the system, caused by double-free error in the curl_maprintf() function on systems using 32 bit size_t variables. 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/118645&gt; 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-2016-8619

Description: cURL/libcurl could allow a remote attacker to execute arbitrary code on the system, caused by double-free error in the krb5 code. 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/118637&gt; 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-2016-8621

Description: cURL/libcurl could allow a remote attacker to obtain sensitive information, caused by an out of bounds read error within the curl_getdate function. By using specially-crafted date strings, a remote attacker could exploit this vulnerability to execute arbitrary code in the context of the process and obtain sensitive information.

CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118639&gt; 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:N/A:N)

CVEID: CVE-2016-8623

Description: cURL/libcurl could allow a local attacker to obtain sensitive information, caused by an use-after-free error. By using another thread to structs original cookie together with its strings, an attacker could exploit this vulnerability to obtain sensitive information.

CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118641&gt; 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:N/A:N)

CVEID: CVE-2016-8624

Description: cURL/libcurl could allow a remote attacker to bypass security restrictions, caused by the failure to parse the authority component of the URL when handling “#” character. By using a specially-crafted URL with “#” character, an attacker could exploit this vulnerability to bypass access restrictions.

CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/118642&gt; 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

Remediation/Fixes:

Firmware fix versions are available on Fix Central:
<http://www.ibm.com/support/fixcentral/&gt;.

Workaround(s) & Mitigation(s):

None

References:

• Complete CVSS v3 Guide
• On-line Calculator v3

Related Information:
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Lenovo Product Security Advisories

Acknowledgement

None

Change History
21 November 2017: Original Copy Published

• The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an “industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES “AS IS” WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.