Security Bulletin - Web Gateway updates fix five vulnerabilities (CVE-2018-15473, CVE-2018-16395, CVE-2018-10844, CVE-2018-10845, and CVE-2018-10846)
Security Bulletins ID:
SB10267
Last Modified: 2022-05-04 15:34:26 Etc/GMT
Last Modified: 2022-05-04 15:34:26 Etc/GMT
Summary
First Published: February 12, 2019
Article contents:
These updates resolve all the following vulnerabilities.
To remediate these issues, go to the Content & Cloud Security Portal, and download the applicable product update file:
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.
Acknowledgments
Vulnerability CVE-2018-15473 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-15473.
Vulnerability CVE-2018-16395 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-16395.
Vulnerability CVE-2018-10844 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10844.
Vulnerability CVE-2018-10845 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10845.
Vulnerability CVE-2018-10846 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10846.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
Use the following instructions for Web Gateway:
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, 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 the successful exploitation of the issue being scored.
What are the CVSS scoring metrics?
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
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.
| Impact of Vulnerability: | CVE-2018-15473: Information exposure CVE-2018-16395: Improper certificate validation CVE-2018-10844: Side channel attack CVE-2018-10845: Side channel attack CVE-2018-10846: Side channel attack |
| CVE ID: | CVE-2018-15473 CVE-2018-16395 CVE-2018-10844 CVE-2018-10845 CVE-2018-10846 |
| Severity Rating: | CVE-2018-15473: Medium CVE-2018-16395: High CVE-2018-10844: Medium CVE-2018-10845: Medium CVE-2018-10846: Medium |
| CVSS v3 Base/Temporal Scores: | CVE-2018-15473: 5.3 / 4.9 CVE-2018-16395: 7.5 / 7.2 CVE-2018-10844: 5.9 / 5.7 CVE-2018-10845: 5.9 / 5.7 CVE-2018-10846: 5.0 / 4.8 |
| Recommendations: | Install or update to Web Gateway (MWG) 7.8.2.6 (main release) Install or update to MWG 8.0.3 (controlled release) |
| Security Bulletin Replacement: | None |
| Affected Software: | CVE-2018-15473: MWG 7.7.2.x, 7.8.2 earlier than 7.8.2.6, 8.0.x CVE-2018-16395: MWG 7.7.2.x, 7.8.2 earlier than 7.8.2.6, 8.0.x CVE-2018-10844: MWG 7.7.2.x, 7.8.2 earlier than 7.8.2.6, 8.0.x CVE-2018-10845: MWG 7.7.2.x, 7.8.2 earlier than 7.8.2.6, 8.0.x CVE-2018-10846: MWG 7.7.2.x, 7.8.2 earlier than 7.8.2.6, 8.0.x |
| Location of updated software: | Content & Cloud Security Portal |
Article contents:
- Vulnerability Description
- Remediation
- Acknowledgments
- Frequently Asked Questions (FAQs)
- Resources
- Disclaimer
These updates resolve all the following vulnerabilities.
- CVE-2018-15473:
OpenSSH is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed.
https://nvd.nist.gov/vuln/detail/CVE-2018-15473
- CVE-2018-16395:
An issue was discovered in the OpenSSL library in Ruby. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true.
https://nvd.nist.gov/vuln/detail/CVE-2018-16395
- CVE-2018-10844:
It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.
https://nvd.nist.gov/vuln/detail/CVE-2018-10844
- CVE-2018-10845:
It was found that GnuTLS's implementation of HMAC-SHA-384 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.
https://nvd.nist.gov/vuln/detail/CVE-2018-10845
- CVE-2018-10846:
A cache-based side channel attack was found in the way GnuTLS implements CBC-mode cipher suites. An attacker could use a combination of "Just in Time" Prime+probe and Lucky Thirteen attacks to recover plain text in a cross-VM attack scenario.
https://nvd.nist.gov/vuln/detail/CVE-2018-10846
To remediate these issues, go to the Content & Cloud Security Portal, and download the applicable product update file:
| Product | Version | Type | File Name | Release Date |
| MWG | 7.8.2.6 and later | Main Release | mwgappl-7.8.2.6.0-27882-x.86_64.iso | February 12, 2019 |
| MWG | 8.0.3 and later | Controlled Release | mwgappl-8.0.3-27937-x.86_64.iso | February 12, 2019 |
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.
Acknowledgments
Vulnerability CVE-2018-15473 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-15473.
Vulnerability CVE-2018-16395 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-16395.
Vulnerability CVE-2018-10844 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10844.
Vulnerability CVE-2018-10845 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10845.
Vulnerability CVE-2018-10846 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-10846.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
Use the following instructions for Web Gateway:
- Open the Administrator's User Interface (UI).
- Log on. The product version displays.
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, 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 the successful exploitation of the issue being scored.
What are the CVSS scoring metrics?
- CVE-2018-15473: OpenSSH through 7.7 is prone to a user enumeration vulnerability
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) Functional (F) 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:L/I:N/A:N/E:F/RL:O
- CVE-2018-16395: An issue was discovered in the OpenSSL library in Ruby
Base Score 7.5 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) None (N) Integrity (I) High (H) Availability (A) None (N) 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:H/A:N/RL:O
- CVE-2018-10844: It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to a Lucky Thirteen-style attack
Base Score 5.9 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) None (N) Availability (A) None (N) Temporal Score (Overall) 5.7 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:N/UI:N/S:U/C:H/I:N/A:N/RL:O
- CVE-2018-10845: It was found that GnuTLS's implementation of HMAC-SHA-384 was vulnerable to a Lucky Thirteen-style attack
Base Score 5.9 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) None (N) Availability (A) None (N) Temporal Score (Overall) 5.7 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:N/UI:N/S:U/C:H/I:N/A:N/RL:O
- CVE-2018--10846: A cache-based side channel attack was found in the way GnuTLS implements CBC-mode cipher suites
Base Score 5.0 Attack Vector (AV) Local (L) 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) None (N) Availability (A) None (N) Temporal Score (Overall) 4.8 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:L/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N/RL:O
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.
