Security Bulletin - Web Gateway update fixes the Huge Dirty Cow vulnerability (CVE-2017-1000405)
Security Bulletins ID:
SB10222
Last Modified: 2022-05-04 15:19:28 Etc/GMT
Last Modified: 2022-05-04 15:19:28 Etc/GMT
Summary
First Published: January 10, 2018
Impact of Vulnerability: | Linux kernel: Can modify read-only pages |
CVE Numbers: | CVE-2017-1000405 |
Severity Rating: | Medium |
CVSS v3 Base and Temporal Scores: | Base: 6.1 Temporal: 5.8 |
Recommendations: | Install or update to Web Gateway 7.6.2.18 Install or update to Web Gateway 7.7.2.8 or later Install or update to Web Gateway 7.8.0.3 |
Security Bulletin Replacement: | None |
Affected Software: | Web Gateway 7.6 until and including 7.6.2.17 Web Gateway 7.7 until and including 7.7.2.7 Web Gateway 7.8 until and including 7.8.0.2 |
Location of Updated Software: | Product Downloads site |
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Article contents:
Description
CVE-2017-1000405
A flaw was found in the patches used to fix the 'Dirty Cow' vulnerability (CVE-2016-5195). An attacker, able to run local code, can exploit a race condition in transparent huge pages, to modify usually read-only huge pages.
https://nvd.nist.gov/vuln/detail/CVE-2017-1000405
A flaw was found in the patches used to fix the 'Dirty Cow' vulnerability (CVE-2016-5195). An attacker, able to run local code, can exploit a race condition in transparent huge pages, to modify usually read-only huge pages.
https://nvd.nist.gov/vuln/detail/CVE-2017-1000405
Remediation
Go to the Product Downloads site and download the applicable product patch files:
Product | Type | Version | File Name | Release Date |
Web Gateway | Maintenance Release | 7.6.2.18 or later | mwgappl-7.6.2.18.0-24974-x.86_64.iso | December 19, 2017 |
Web Gateway | Maintenance Release | 7.7.2.8 or later | mwgappl-7.7.2.8.0-25114-x.86_64.iso | January 9, 2018 |
Web Gateway | Feature Release | 7.8.0.3 or later | mwgappl-7.8.0.3.0-25120-x.86_64.iso | January 9, 2018 |
Download and Installation Instructions
For instructions to download product updates and hotfixes, see KB56057 - How to download Enterprise product updates and documentation. Review the Release Notes and the Installation Guide for instructions on how to install these updates. All documentation is available on the Product Documentation site.
Workaround
None. We strongly recommend installing the provided release specified in the Remediation table.
Frequently Asked Questions (FAQs)
How do I know whether my product is vulnerable?
For Appliances:
Use the following instructions for Appliance-based products: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.
When calculating CVSS scores, we've 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-2017-1000405:
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:N/I:H/A:L/RL:O
Where can I find a list of all Security Bulletins?
All Security Bulletins are published on our Knowledge Center. Security Bulletins are retired (removed) once a product is both End of Sale and End of Support (End of Life).
How do I report a product vulnerability to you?
If you have information about a security issue or vulnerability with a product, follow the instructions provided in KB95563 - Report a vulnerability.
How do you 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 our 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.
We only publish Security Bulletins if they include something actionable such as a workaround, mitigation, version update, or hotfix. Otherwise, we would simply be informing the hacker community that our products are a target, putting our customers at greater risk. For products that are updated automatically, a non-actionable Security Bulletin might be published to acknowledge the discoverer.
To view our PSIRT policy, see KB95564 - About PSIRT.
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.
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.
When calculating CVSS scores, we've 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 | 6.1 |
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) | None (N) |
Integrity (I) | High (H) |
Availability (A) | Low (L) |
Temporal Score (Overall) | 5.8 |
Exploitability (E) | Not Defined (X) |
Remediation Level (RL) | Official Fix (O) |
Report Confidence (RC) | Confirmed (C) |
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:N/I:H/A:L/RL:O
Where can I find a list of all Security Bulletins?
All Security Bulletins are published on our Knowledge Center. Security Bulletins are retired (removed) once a product is both End of Sale and End of Support (End of Life).
How do I report a product vulnerability to you?
If you have information about a security issue or vulnerability with a product, follow the instructions provided in KB95563 - Report a vulnerability.
How do you 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 our 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.
We only publish Security Bulletins if they include something actionable such as a workaround, mitigation, version update, or hotfix. Otherwise, we would simply be informing the hacker community that our products are a target, putting our customers at greater risk. For products that are updated automatically, a non-actionable Security Bulletin might be published to acknowledge the discoverer.
To view our PSIRT policy, see KB95564 - About PSIRT.
Resources
To contact Technical Support, go to the Create a Service Request page and log on to the ServicePortal.
- If you are a registered user, type your User ID and Password, and then click Log In.
- If you are not a registered user, click Register and complete the fields to have your password and instructions emailed to you.
Disclaimer
The information provided in this Security Bulletin is provided as is without warranty of any kind. We disclaim all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall we or our suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if we or our suppliers have been advised of the possibility of such damages. Some states don't allow the exclusion or limitation of liability for consequential or incidental damages, so the preceding limitation may not apply.
Any future product release dates mentioned in this Security Bulletin are intended to outline our general product direction, and they shouldn't be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates aren't a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remain at our sole discretion and may be changed or canceled at any time.
Any future product release dates mentioned in this Security Bulletin are intended to outline our general product direction, and they shouldn't be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates aren't a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remain at our sole discretion and may be changed or canceled at any time.