Security Bulletin - Web Gateway update fixes four third-party vulnerabilities (CVE-2018-18311, CVE-2018-5742, CVE-2019-9169, and CVE-2019-6454)
Security Bulletins ID:
SB10278
Last Modified: 2022-05-04 15:41:43 Etc/GMT
Last Modified: 2022-05-04 15:41:43 Etc/GMT
Summary
First Published: April 9, 2019
Article contents:
These vulnerabilities were reported against the Open Source Operating System that MWG runs on.
To remediate this issue, go to the Product Downloads site, 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-2018-18311 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-18311.
Vulnerability CVE-2018-5742 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-5742.
Vulnerability CVE-2019-9169 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2019-9169.
Vulnerability CVE-2019-6454 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2019-6454.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
For Appliances:
Use the following instructions for MWG:
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-2018-18311: perl: Buffer overflow CVE-2018-5742: bind: Assertion failure CVE-2019-9169: glibc: Out-Of-Bounds Read CVE-2019-6454: systemd: Insufficient input validation |
CVE ID: | CVE-2018-18311 CVE-2018-5742 CVE-2019-9169 CVE-2019-6454 |
Severity Rating: | CVE-2018-18311: High CVE-2018-5742: Medium CVE-2019-9169: Medium CVE-2019-6454: Medium |
CVSS v3 Base/Temporal Scores: | CVE-2018-18311: 7.4 / 7.1 CVE-2018-5742: 5.9 / 5.7 CVE-2019-9169: 6.5 / 6.2 CVE-2019-6454: 6.4 / 6.1 |
Recommendations: | Install or update to Web Gateway (MWG) 7.7.2.21 (Main Release) Install or update to MWG 7.8.2.8 (Main Release) Install or update to MWG 8.1.1 (Controlled Release) |
Security Bulletin Replacement: | None |
Affected Software: | CVE-2018-18311: MWG 7.7.2 earlier than MWG 7.7.2.21; MWG 7.8.2 earlier than MWG 7.8.2.8, 8.x earlier than 8.1.1 CVE-2018-5742: MWG 7.8.2 earlier than MWG 7.8.2.8, 8.x earlier than 8.1.1 CVE-2019-9169: MWG 7.7.2 earlier than MWG 7.7.2.21; MWG 7.8.2 earlier than MWG 7.8.2.8, 8.x earlier than 8.1.1 CVE-2019-6454: MWG 7.7.2 earlier than MWG 7.7.2.21; MWG 7.8.2 earlier than MWG 7.8.2.8, 8.x earlier than 8.1.1 |
Location of updated software: | Product Downloads site |
Article contents:
- Vulnerability Description
- Remediation
- Acknowledgments
- Frequently Asked Questions (FAQs)
- Resources
- Disclaimer
These vulnerabilities were reported against the Open Source Operating System that MWG runs on.
- 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. This CVE is also referenced in SB10276 where we implemented a partial fix. These releases contain the complete fix.
- CVE-2018-5742
This flaw appears to be exploitable only when debug logging is enabled and set to at least a level of 10. As this configuration should be rare in production instances of bind, it is unlikely that most servers will be exploitable.
- CVE-2019-9169
In the GNU C Library (also known as glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.
- CVE-2019-6454
Systemd allocates a buffer large enough to store the path field of a dbus message without performing enough checks. A local attacker may trigger this flaw by sending a dbus message to systemd with a large path making systemd crash or possibly elevating his privileges.
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 | 7.7.2.21 or later | Main Release | mwgappl-7.7.2.21.0-28544-x.86_64.iso | April 9, 2019 |
MWG | 7.8.2.8 or later | Main Release | mwgappl-7.8.2.8.0-28536-x.86_64.iso | April 9, 2019 |
MWG | 8.1.1 or later | Controlled Release | mwgappl-8.1.1-28538.x.86_64.iso | April 9, 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-2018-18311 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-18311.
Vulnerability CVE-2018-5742 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2018-5742.
Vulnerability CVE-2019-9169 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2019-9169.
Vulnerability CVE-2019-6454 was reported by Red Hat: https://access.redhat.com/security/cve/cve-2019-6454.
Frequently Asked Questions (FAQs)
How do I know if my product is vulnerable?
For Appliances:
Use the following instructions for MWG:
- Open the Administrator's User Interface (UI).
- Click the About link. 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-2018-18311: 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 (N) 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
- CVE-2018-5742: bind: Assertion failure
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) None (N) Integrity (I) None (N) Availability (A) High (H) 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:N/I:N/A:H/RL:O
- CVE-2019-9169: glibc: Out-Of-Bounds Read
Base Score 6.5 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) Low (L) Integrity (I) None (N) Availability (A) Low (L) Temporal Score (Overall) 6.2 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:L/I:N/A:L/RL:O
- CVE-2019-6454: systemd: Insufficient input validation
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
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.