McAfee Security Bulletin: McAfee Web Gateway update fixes multiple vulnerabilities
Security Bulletins ID:
SB10156
Last Modified: 4/6/2017
Last Modified: 4/6/2017
Summary
First Published: 02/25/2016
| Impact of Vulnerability: | Cryptographic Issue (CWE-310)
Denial of Service (CWE-730, OWASP 2004:A9)
Directory Traversal (CWE-22)
Permissions, Privileges, and Access Control (CWE-264)
|
| CVE Numbers: | CVE-2015-5345
CVE-2016-0787
CVE-2016-0705,
CVE-2016-0797
CVE-2016-0702
|
| Severity Rating: | Medium |
| Base / Overall CVSS v3 Scores: | CVE-2015-5345, 5.3 / 4.9
CVE-2016-0787, 4.8 / 4.0
CVE-2016-0705, 3.7 / 3.4
CVE-2016-0797, 3.7 / 3.4
CVE-2016-0702, 4.0 / 3.7 not exploitable because no local users exist on appliance
|
| Recommendations: | Install or update to 7.5.2.7 or 7.6.1.2 |
| Security Bulletin Replacement: | None |
| Affected Software: | McAfee Web Gateway (MWG) 7.5.2.6 and earlier, 7.6.1.1 and earlier |
| Location of Updated Software: | http://www.mcafee.com/us/downloads/downloads.aspx |
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Article contents:
Description
CVE-2015-5345 - Information disclosure.
Attackers that have access to the GUI Admin Console could list file system entities of the MWG appliance.
- CVE-2015-5345: Allows attackers to determine the existence of a directory
This vulnerability affects Apache Tomcat. https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-5345
- CWE-200 Information Leak / Disclosure: The intentional disclosure of information to an actor that is not explicitly authorized to have access to that information. http://cwe.mitre.org/data/definitions/200.html
CVE-2016-0787 - Weak/By-pass of encryption.
Session parameters of SSH handshake are less secure than should be. Attackers could theoretically guess those parameters, which could render the encryption useless.
- CVE-2016-0787:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0787
https://www.libssh2.org/adv_20160223.html
- CWE-200 Information Leak / Disclosure: The intentional disclosure of information to an actor that is not explicitly authorized to have access to that information. http://cwe.mitre.org/data/definitions/200.html
- CWE-310 Cryptographic Issues: Weaknesses in the use of cryptography. http://cwe.mitre.org/data/definitions/310.html
- CWE-330: Use of Insufficiently Random Values: The software may use insufficiently random numbers or values in a security context that depends on unpredictable numbers. https://cwe.mitre.org/data/definitions/330.html
CVE-2016-0705 - DOS via double free/memory corruption.
Attackers could theoretically crash MWGs scanning component and hence disrupt its service temporarily but repeatable.
- CVE-2016-0705:
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-0705
https://www.openssl.org/news/secadv/20160301.txt
- CWE-415: Double Free: The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. https://cwe.mitre.org/data/definitions/415.html
CVE-2016-0797 - DOS and potentially other impacts via memory corruption and integer overflow.
Attackers could theoretically crash MWGs scanning component and hence disrupt its service temporarily but repeatable. Potentially there are other unspecified side effects.
- CVE-2016-0797:
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-0797
https://www.openssl.org/news/secadv/20160301.txt
- CWE-190: Integer Overflow or Wraparound: Weaknesses in the use of cryptography. http://cwe.mitre.org/data/definitions/310.html
CVE-2016-0702 - Information disclosure via by reading other processes processor cache lines.
Not exploitable because there are no local users on an MWG appliance.
Not exploitable because there are no local users on an MWG appliance.
- CVE-2016-0702:
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-0702
https://www.openssl.org/news/secadv/20160301.txt
- CWE-524: Information Exposure Through Caching: Sensible information can leak because an attacker can read cached memory values from other processes. https://cwe.mitre.org/data/definitions/524.html
- CWE-200 Information Leak / Disclosure: The intentional disclosure of information to an actor that is not explicitly authorized to have access to that information. http://cwe.mitre.org/data/definitions/200.html
Remediation
| Product | Type | Version | File Name | Release Date |
| MWG 7.5.2.7 | Maintenance Release |
7.5.2.7 | n/a | April 6, 2016 |
| MWG 7.6.1.2 | Maintenance Release |
7.6.1.2 | n/a | April 6, 2016 |
Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, security updates, patches, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.
Frequently Asked Questions (FAQs)
How do I know whether my McAfee product is vulnerable or not?
For Endpoint products:
Use the following instructions for endpoint or client based products:
Check the version and build of ePO that is installed. For information on how to check the version, see KB52634.
For Appliances:
Use the following instructions for Appliance based products:
Use the following instructions:
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, please visit the CVSS website at: http://www.first.org/cvss/.
When calculating CVSS v2 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 successful exploitation of the issue being scored.
CVSS v3 scoring is in final review as of December 2015. CVSS v2 will be replaced with CVSS v3 when v3 is fully approved. Security bulletins will have scores for both versions for at least 6 months after v3 is fully approved.
https://www.first.org/cvss/v3/development
https://www.first.org/cvss/calculator/3.0
What are the CVSS scoring metrics that have been used?
CVSS v3 Scoring:
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:R
CVE-2016-0787
CVSS v3 Scoring:
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:R
CVE-2016-0705
CVSS v3 Scoring:
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:R
CVE-2016-0797
CVSS v3 Scoring:
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:R
CVE-2016-0702
CVSS v3 Scoring:
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:X/RL:O/RC:R
Where can I find a list of all security bulletins or how do I report a product vulnerability?
To find a list of all security bulletins, or if you have information about a security issue or vulnerability with a McAfee product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.
For Endpoint products:
Use the following instructions for endpoint or client based products:
- Right-click on the McAfee tray shield icon on the Windows task bar.
- Select Open Console.
- In the console, select Action Menu.
- In the Action Menu, select Product Details. The product version is displayed.
Check the version and build of ePO that is installed. For information on how to check the version, see KB52634.
For Appliances:
Use the following instructions for Appliance based products:
- Open the Administrator's User Interface (UI).
- Click the About link. The product version is displayed.
Use the following instructions:
- Log on to ePO server.
- Click Menu, Data Protection, DLP Policy.
- Inside the DLP console click the Help menu item, About. The product version is displayed.
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, please visit the CVSS website at: http://www.first.org/cvss/.
When calculating CVSS v2 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 successful exploitation of the issue being scored.
CVSS v3 scoring is in final review as of December 2015. CVSS v2 will be replaced with CVSS v3 when v3 is fully approved. Security bulletins will have scores for both versions for at least 6 months after v3 is fully approved.
https://www.first.org/cvss/v3/development
https://www.first.org/cvss/calculator/3.0
CVE-2015-5345
CVSS v3 Scoring:
| Base Score | 5.3 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | None (N) |
| User Interaction (UI) | None (N) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | None (N) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 4.9 |
| Exploitability (E) | Not Defined (X) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Reasonable (R) |
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:R
CVE-2016-0787
CVSS v3 Scoring:
| Base Score | 4.8 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | None (N) |
| User Interaction (UI) | None (N) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | Low (L) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 4.0 |
| Exploitability (E) | Unproven(U) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Reasonable (R) |
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:R
CVE-2016-0705
CVSS v3 Scoring:
| Base Score | 3.7 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | None(N) |
| User Interaction (UI) | None (N) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | None (N) |
| Integrity (I) | Low (L) |
| Availability (A) | Low (L) |
| Temporal Score (Overall) | 3.4 |
| Exploitability (E) | Not Defined (X) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Reasonable (R) |
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:R
CVE-2016-0797
CVSS v3 Scoring:
| Base Score | 3.7 |
| Attack Vector (AV) | Network(N) |
| Attack Complexity (AC) | High(H) |
| Privileges Required (PR) | None (N) |
| User Interaction (UI) | None (N) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | Low (L) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 3.4 |
| Exploitability (E) | Not Defined (X) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Reasonable (R) |
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:R
CVE-2016-0702
CVSS v3 Scoring:
| Base Score | 4.0 |
| Attack Vector (AV) | Local (L) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | None (N) |
| User Interaction (UI) | None (N) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | Low (L) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 3.7 |
| Exploitability (E) | Not Defined (X) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Reasonable (R) |
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:X/RL:O/RC:R
Where can I find a list of all security bulletins or how do I report a product vulnerability?
To find a list of all security bulletins, or if you have information about a security issue or vulnerability with a McAfee product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.
Resources
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