McAfee Security Bulletin: VirusScan Enterprise for Linux/LinuxShield update fixes multiple vulnerabilities (CVE-2016-8016, CVE-2016-8017, CVE-2016-8018, CVE-2016-8019, CVE-2016-8020, CVE-2016-8021, CVE-2016-8022, CVE-2016-8023, CVE-2016-8024, CVE-2016-8025)
Security Bulletins ID:
SB10181
Last Modified: 5/18/2017
Last Modified: 5/18/2017
Summary
First Published: 12/9/2016
| CVE Information | ||||
| CVE Numbers | Severity Rating | CVSS v3 Base Score / Temporal Scores |
Impact of Vulnerability | |
| CVE-2016-8023 | High | 8.1 / 7.1 | Authentication Bypass by Assumed-Immutable Data (CWE-302 - http://cwe.mitre.org/data/definitions/302.html) | |
| CVE-2016-8024 | High | 8.1 / 7.1 | Improper Neutralization of CRLF Sequences in HTTP (CWE-113 - http://cwe.mitre.org/data/definitions/113.html) | |
| CVE-2016-8020 | High | 8.0 / 7.0 | Improper Control of Generation of Code (CWE-94 - http://cwe.mitre.org/data/definitions/94.html) | |
| CVE-2016-8022 | High | 7.5 / 6.5 | Authentication Bypass by Spoofing (CWE-290 - http://cwe.mitre.org/data/definitions/290.html) | |
| CVE-2016-8025 | Medium | 6.2 / 5.4 | Improper Neutralization of Special Elements used in an SQL Command (CWE-89 - http://cwe.mitre.org/data/definitions/89.html) | |
| CVE-2016-8021 | Medium | 4.4 / 3.9 | Improper Verification of Cryptographic Signature (CWE-347 - http://cwe.mitre.org/data/definitions/347.html) | |
| CVE-2016-8018 | Medium | 4.3 / 3.8 | Cross-Site Request Forgery (CWE-352 - http://cwe.mitre.org/data/definitions/352.html) | |
| CVE-2016-8019 | Medium | 4.3 / 3.8 | Cross-Site Scripting (CWE-79 - http://cwe.mitre.org/data/definitions/79.html) | |
| CVE-2016-8016 | Low | 3.4 / 3.0 | Information Exposure (CWE-200 - http://cwe.mitre.org/data/definitions/200.html) | |
| CVE-2016-8017 | Low | 3.4 / 3.0 | Failure to Sanitize Special Elements (CWE-75 - http://cwe.mitre.org/data/definitions/75.html) | |
| Recommendations: | Upgrade to Endpoint Security for Linux (ENSL) Threat Prevention 10.2 or later | |||
| Security Bulletin Replacement: | None | |||
| Affected Software: | VirusScan Enterprise for Linux (VSEL) 2.0.3 and earlier | |||
| Location of Updated Software: | http://www.mcafee.com/us/downloads/downloads.aspx | |||
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Article contents:
Description
VSEL 2.0.3 (and earlier) is vulnerable to the following published security vulnerabilities. The ENSL 10.2 release resolves the following vulnerabilities. McAfee highly recommends that all customers upgrade from VSEL to ENSL.
- CVE-2016-8016
Information Exposure in VirusScan Enterprise Linux 2.0.3 (and earlier) allows authenticated remote attackers to obtain the existence of unauthorized files on the system via a URL parameter.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8016 - CVE-2016-8017
Special Element Injection in VirusScan Enterprise Linux 2.0.3 (and earlier) allows authenticated remote attackers to read files on the webserver via a crafted user input.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8017 - CVE-2016-8018
Cross Site Request Forgery (CSRF) in VirusScan Enterprise Linux 2.0.3 (and earlier) allows authenticated remote attackers to execute unauthorized commands via a crafted user input.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8018 - CVE-2016-8019
Cross-Site Scripting (XSS) vulnerability in attributes in VirusScan Enterprise Linux 2.0.3 (and earlier) allows unauthenticated remote attackers to inject arbitrary web script or HTML via a crafted user input.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8019 - CVE-2016-8020
Improper control of generation of code vulnerability in VirusScan Enterprise Linux 2.0.3 (and earlier) allows remote authenticated users to execute arbitrary code via a crafted HTTP request parameter.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8020 - CVE-2016-8021
Improper verification of cryptographic signature vulnerability in VirusScan Enterprise Linux 2.0.3 (and earlier) allows remote authenticated users to spoof update server and execute arbitrary code via a crafted input file.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8021 - CVE-2016-8022
Authentication bypass by spoofing in VirusScan Enterprise Linux 2.0.3 (and earlier) allows a remote unauthenticated attacker to execute arbitrary code or cause a denial of service via a crafted authentication cookie.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8022 - CVE-2016-8023
Authentication bypass by assumed-immutable data in VirusScan Enterprise Linux 2.0.3 (and earlier) allows a remote unauthenticated attacker to bypass server authentication via a crafted authentication cookie.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8023 - CVE-2016-8024
Improper neutralization of CRLF sequences in HTTP headers vulnerability in VirusScan Enterprise Linux 2.0.3 (and earlier) allows a remote unauthenticated attacker to obtain sensitive information via the server HTTP response spoofing.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8024 - CVE-2016-8025
SQL injection vulnerability in VirusScan Enterprise Linux 2.0.3 (and earlier) allows remote authenticated users to obtain product information via a crafted HTTP request parameter.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8025
Remediation
| Product | Type | Version | File Name | Release Date |
| Endpoint Security for Linux | RTW | 10.2.0 | ISecTP-10.2.0-534-Release-standalone.tar.gz ISecTP-10.2.0-534-Release-ePO.zip |
September 8, 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.
Product Specific Notes
Workaround
Installing the provided product package specified in the Remediation table is strongly encouraged.
For ePolicy Orchestrator (ePO) managed systems, customers can disable the VSEL Web Interface using the following steps:
For ePolicy Orchestrator (ePO) managed systems, customers can disable the VSEL Web Interface using the following steps:
- Log into the ePO console.
- Open the policy catalog for VirusScan Enterprise for Linux 1.9.2/2.0.3.
- Open the General Policies policy that is currently assigned.
- Click the Advanced tab.
- Check the box next to Disable client Web UI.
- Click Save.
- Perform an Agent wakeup call to enforce the policy.
For unmanaged systems, customers can disable the VSEL Web Interface using the following steps:
- From a terminal session open the following file in a text editor:
<runtimeDir>/etc/nailsd.cfg
NOTE: The default location is /var/opt/NAI/LinuxShield/etc/nailsd.cfg.
- Locate the following entry
nailsd.disableCltWEbUI: false
- Change the value to true.
- Save and close the file.
- Run the following command to restart the nails service:
service nails restart or /etc/init.d/nails restart
Mitigations
Frequently Asked Questions (FAQs)
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, please 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 successful exploitation of the issue being scored
What are the CVSS scoring metrics that have been used?
CVE-2016-8016: Information Exposure
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:H/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C
CVE-2016-8017: Failure to Sanitize Special Elements
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:H/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C
CVE-2016-8018: Cross-Site Request Forgery (CSRF)
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:H/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
CVE-2016-8019: Cross-Site Scripting
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:H/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
CVE-2016-8020: Improper Control of Generation of Code
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:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CVE-2016-8021: Improper Verification of Cryptographic Signature
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:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
CVE-2016-8022: Authentication Bypass by Spoofing
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:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVE-2016-8023: Authentication Bypass by Assumed-Immutable Data
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:H/I:H/A:H/E:U/RL:O/RC:C
CVE-2016-8024: Improper Neutralization of CRLF Sequences in HTTP Headers
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:H/I:H/A:H/E:U/RL:O/RC:C
CVE-2016-8025: Improper Neutralization of Special Elements used in an SQL Command
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:H/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
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.
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 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
| Base Score | 3.4 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Changed (C) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | None (N) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 3.0 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C
| Base Score | 3.4 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Changed (C) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | None (N) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 3.0 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C
| Base Score | 4.3 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | Low (L) |
| Availability (A) | Low (L) |
| Temporal Score (Overall) | 3.8 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
| Base Score | 4.3 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | Low (L) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | Low (L) |
| Availability (A) | Low (L) |
| Temporal Score (Overall) | 3.8 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
| Base Score | 8.0 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Changed (C) |
| Confidentiality (C) | High (H) |
| Integrity (I) | High (H) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 7.0 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
| Base Score | 4.4 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | High (H) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Unchanged (U) |
| Confidentiality (C) | None(N) |
| Integrity (I) | High (H) |
| Availability (A) | None (N) |
| Temporal Score (Overall) | 3.9 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
| Base Score | 7.5 |
| Attack Vector (AV) | Network (N) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | None (N) |
| User Interaction (UI) | Required (R) |
| Scope (S) | Unchanged (C) |
| Confidentiality (C) | High (H) |
| Integrity (I) | High (H) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 6.5 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
| Base Score | 8.1 |
| 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) | High (H) |
| Integrity (I) | High (H) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 7.1 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/I:H/A:H/E:U/RL:O/RC:C
| Base Score | 8.1 |
| 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) | High (H) |
| Integrity (I) | High (H) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 7.1 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/I:H/A:H/E:U/RL:O/RC:C
| Base Score | 6.2 |
| Attack Vector (AV) | Network (N) |
| 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) | Low (L) |
| Temporal Score (Overall) | 5.4 |
| Exploitability (E) | Unproven that Exploit Exists (U) |
| Remediation Level (RL) | Official Fix (OF) |
| Report Confidence (RC) | Confirmed (C) |
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:H/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
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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Disclaimer
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