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McAfee Security Bulletin - Web Gateway update fixes several third-party vulnerabilities (CVE-2018-16864, CVE-2018-16865, CVE-2018-10897, CVE-2018-6485, CVE-2016-4463, CVE-2018-0494, and CVE-2018-18311)
Security Bulletins ID:   SB10276
Last Modified:  3/14/2019

Summary

First Published: March 12, 2019
 

Impact of Vulnerability:  

CVE-2018-16864: Stack overflow
CVE-2018-16865: Stack overflow
CVE-2018-10897: Directory traversal
CVE-2018-6485: Integer overflow
CVE-2016-4463: Stack overflow 
CVE-2018-0494: Improper input validation
CVE-2018-18311: Buffer overflow
 CVE ID: 

 

CVE-2018-16864
CVE-2018-16865
CVE-2018-10897
CVE-2018-6485
CVE-2016-4463
CVE-2018-0494
CVE-2018-18311

Severity Rating: 

CVE-2018-16864: Medium
CVE-2018-16865: High
CVE-2018-10897: High
CVE-2018-6485: Medium 
CVE-2016-4463: High
CVE-2018-0494: High
CVE-2018-18311: High

 CVSS v3 Base / Temporal Scores: 

CVE-2018-16864: 6.4 / 6.1
CVE-2018-16865: 7.5 / 7.2
CVE-2018-10897: 8.8 / 8.4
CVE-2018-6485: 5.3 / 5.1
CVE-2016-4463: 7.5 / 7.2
CVE-2018-0494: 7.1 / 6.8
CVE-2018-18311: 7.4 / 7.1

Recommendations: 

Install or update to McAfee Web Gateway (MWG) 7.7.2.20
Install or update to MWG 7.8.2.7 (main release)
Install or update to MWG 8.1 (controlled release)
Security Bulletin Replacement:
None

Affected Software: 

CVE-2018-16864: MWG 7.8.2 earlier than MWG 7.8.2.7, 8.x earlier than 8.1 
CVE-2018-16865: MWG 7.8.2 earlier than MWG 7.8.2.7, 8.x earlier than 8.1
CVE-2018-10897: MWG 7.7.2 earlier than MWG 7.7.2.20, 7.8.2 earlier than 7.8.2.7, 8.x earlier than 8.1
CVE-2018-6485: MWG 7.7.2, 7.8.2 earlier than 7.8.2.7, 8.x earlier than 8.1 
CVE-2016-4463: MWG 7.7.2 earlier than MWG 7.7.2.20, 7.8.2 earlier than 7.8.2.7, 8.x earlier than 8.1
CVE-2018-0494: MWG 7.7.2 earlier than MWG 7.7.2.20, 7.8.2 earlier than 7.8.2.7, 8.x earlier than 8.1
CVE-2018-18311: MWG 7.7.2, 7.8.2 earlier than 7.8.2.7, 8.x earlier than 8.1 
Location of updated software:

MWG 7.7.2.20 includes the fix for CVE-2018-15473 that was addressed previously in 7.8 and 8.0, and is described in SB10267. CVE-2018-16395 from the same Security Bulletin does not apply to 7.7.2.x.

MWG 7.7.2.20 does not include the fix for CVE-2018-18311 and CVE-2018-6485.

Article contents: Vulnerability Description
These vulnerabilities were reported against the Open Source operating system that MWG runs on:
  1. CVE-2018-16864:
    An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate privileges.
    https://nvd.nist.gov/vuln/detail/CVE-2018-16864
     
  2. CVE-2018-16865:
    An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges.
    https://nvd.nist.gov/vuln/detail/CVE-2018-16865
     
  3. CVE-2018-10897:
    A directory traversal issue was found in reposync, a part of yum-utils, where reposync fails to sanitize paths in remote repository configuration files. If an attacker controls a repository, they may be able to copy files outside of the destination directory on the targeted system via path traversal.
    https://nvd.nist.gov/vuln/detail/CVE-2018-10897
     
  4. CVE-2018-6485:
    An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption. The packet update fixes other CVEs that are not exploitable (CVE-2017-16997, CVE-2018-11236, and CVE-2018-11237).
    https://nvd.nist.gov/vuln/detail/CVE-2018-6485
     
  5. CVE-2016-4463:
    A stack exhaustion flaw was found in the way Xerces-C XML parser handled deeply nested DTDs. An attacker could potentially use this flaw to crash an application.
    https://nvd.nist.gov/vuln/detail/CVE-2018-4463
     
  6. CVE-2018-0494:
    A cookie injection flaw was found in wget. An attacker can create a malicious website which, when accessed, overrides cookies belonging to arbitrary domains.
    https://nvd.nist.gov/vuln/detail/CVE-2018-0494
     
  7. CVE-2018-18311:
    Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
    https://nvd.nist.gov/vuln/detail/CVE-2018-18311
     
  8. Other updated third-party libraries
    The curl package was updated to cover 5 vulnerabilities (CVE-2018-1000007, CVE-2018-1000120, CVE-2018-1000121, CVE-2018-1000122, and CVE-2018-1000301). The highest CVSS3 score among these is 6.5.

    The python package was updated to cover 2 vulnerabilities (CVE-2018-1060 and CVE-2018-1061). The highest CVSS3 score among these is 6.5.
Remediation
To remediate this issue, go to the Product Downloads site, and download the applicable product update file:
 
Product Version Type File Name Release Date
MWG 7.7.2.20 Main Release mwgappl-7.7.2.20.0-28223-x.86_64.iso March 12, 2019
MWG 7.8.2.7 Main Release mwgappl-7.8.2.7.0-28225-x.86_64.iso March 12, 2019
MWG 8.1 Controlled Release mwgappl-8.1.0-28227x.86_64.iso March 12, 2019
 
Download and Installation Instructions
All documentation and software relating to this and other MWG releases can be found on https://contentsecurity.mcafee.com/.
Workaround
None.
Acknowledgments
Vulnerability CVE-2018-16864 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-16864.
Vulnerability CVE-2018-16865 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-16865.
Vulnerability CVE-2018-10897 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10897.
Vulnerability CVE-2018-6485 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-6485.
Vulnerability CVE-2016-4463 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2016-4463.
Vulnerability CVE-2018-0494 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-0494
Vulnerability CVE-2018-18311 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-18311.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not?
For Appliances:
Use the following instructions for Appliance-based products:
  1. Open the Administrator's User Interface (UI).
  2. Click the About link. The product version displays.
What is CVSS?
CVSS, or Common Vulnerability Scoring System, is the result of the National Infrastructure Advisory Council's effort to standardize a system of assessing the criticality of a vulnerability. This system offers an unbiased criticality score between 0 and 10 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, visit the CVSS website at: http://www.first.org/cvss/.
 
When calculating CVSS scores, McAfee has adopted a philosophy that fosters consistency and repeatability. Our guiding principle for CVSS scoring is to score the exploit under consideration by itself. We consider only the immediate and direct impact of the exploit under consideration. We do not factor into a score any potential follow-on exploits that might be made possible by the successful exploitation of the issue being scored.
 
What are the CVSS scoring metrics?
  1. CVE-2018-16864: system infinite memory allocation
     
    Base Score 6.4
    Attack Vector (AV) Local (L)
    Attack Complexity (AC) High (H)
    Privileges Required (PR) High (H)
    User Interaction (UI) None (N)
    Scope (S) Unchanged (U)
    Confidentiality (C) High (H)
    Integrity (I) High (H)
    Availability (A) High (H)
    Temporal Score (Overall) 6.1
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)    
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/RL:O
     
  2. CVE-2018-16865: system infinite memory allocation
     
    Base Score 7.5
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) High (H)
    Privileges Required (PR) Low (L)
    User Interaction (UI) None (N)
    Scope (S) Unchanged (U)
    Confidentiality (C) High (H)
    Integrity (I) High (H)
    Availability (A) High (H)
    Temporal Score (Overall) 7.2
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/RL:O
     
  3. CVE-2018-10897: Directory traversal in yum-utils
     
    Base Score 8.8
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) Low (L)
    Privileges Required (PR) None (N)
    User Interaction (UI) Required (R)
    Scope (S) Unchanged (U)
    Confidentiality (C) High (H)
    Integrity (I) High (H)
    Availability (A) High (H)
    Temporal Score (Overall) 8.4
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/RL:O
     
  4. CVE-2018-6485: Integer overflow in glibc
     
    Base Score 5.3
    Attack Vector (AV) Local (L)
    Attack Complexity (AC) Low (L)
    Privileges Required (PR) Low (L)
    User Interaction (UI) None (N)
    Scope (S) Unchanged (U)
    Confidentiality (C) Low (L)
    Integrity (I) Low (L)
    Availability (A) Low (L)
    Temporal Score (Overall) 5.1
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X) 
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/RL:O
     
  5. CVE-2016-4463: Stack overflow in Xerces-C
     
    Base Score 7.5
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) Low (L)
    Privileges Required (PR) Low (L)
    User Interaction (UI) None (N)
    Scope (S) Unchanged (U)
    Confidentiality (C) None (N)
    Integrity (I) None (N)
    Availability (A) High (H)
    Temporal Score (Overall) 7.2
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O
     
  6. CVE-2018-0494: wget: Cookie injection
     
    Base Score 7.1
    Attack Vector (AV) Network (N)
    Attack Complexity (AC) Low (L)
    Privileges Required (PR) Low (L)
    User Interaction (UI) Required (R)
    Scope (S) Unchanged (U)
    Confidentiality (C) High (H)
    Integrity (I) Low (L)
    Availability (A) None (N)
    Temporal Score (Overall) 6.8
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X) 
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/RL:O
     
  7. CVE-2018-18311: perl: Buffer overflow
     
    Base Score 7.4
    Attack Vector (AV) Local (L)
    Attack Complexity (AC) High (H)
    Privileges Required (PR) None (N)
    User Interaction (UI) None (R)
    Scope (S) Unchanged (U)
    Confidentiality (C) High (H)
    Integrity (I) High (H)
    Availability (A) High (H)
    Temporal Score (Overall) 7.1
    Exploitability (E) Not Defined (X)
    Remediation Level (RL) Official Fix (O)
    Report Confidence (RC) Not Defined (X)
     
    NOTE: The below CVSS version 3.0 vector was used to generate this score.
    https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/RL:O
Where can I find a list of all Security Bulletins?
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How do I report a product vulnerability to McAfee?
If you have information about a security issue or vulnerability with a McAfee product, visit the McAfee PSIRT website for instructions at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Report a Security Vulnerability.
 
How does McAfee respond to this and any other reported security flaws?
Our key priority is the security of our customers. If a vulnerability is found within any of McAfee software or services, we work closely with the relevant security software development team to ensure the rapid and effective development of a fix and communication plan.
 
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View our PSIRT policy on the McAfee PSIRT website at http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > About PSIRT.
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