Symantec Messaging Gateway RCE and CSRF
SUMMARY
Symantec has released an update to address two issues that were discovered in the Symantec Messaging Gateway (SMG).
AFFECTED PRODUCTS
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Symantec Messaging Gateway (SMG) |
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CVE |
Affected Version(s) |
Remediation |
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CVE-2017-6327 CVE-2017-6328 |
Prior to 10.6.3-267 |
Upgrade to 10.6.3-267 |
ISSUES
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CVE-2017-6327 |
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Severity/CVSSv3: |
High / 7.6 (AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H) |
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References: Impact: |
Securityfocus: BID 100135 / NVD: CVE-2017-6327 Code Execution |
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Description: |
The Symantec Messaging Gateway can encounter an issue of remote code execution, which describes a situation whereby an individual may obtain the ability to execute commands remotely on a target machine or in a target process. In this type of occurrence, after gaining access to the system, the attacker may attempt to elevate their privileges. |
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CVE-2017-6328 |
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Severity/CVSSv3: |
Low / 2.6 (AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L) |
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References: Impact: |
Securityfocus: BID 100136 / NVD: CVE-2017-6328 Privilege escalation |
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Description: |
The Symantec Messaging Gateway can encounter an issue of cross site request forgery (also known as one-click attack and is abbreviated as CSRF or XSRF), which is a type of malicious exploit of a website where unauthorized commands are transmitted from a user that the web application trusts. A CSRF attack attempts to exploit the trust that a specific website has in a user's browser. |
MITIGATION
These issues were validated by the product team engineers. A Symantec Messaging Gateway update, version 10.6.3-267, has been released which addresses the aforementioned vulnerabilities. Please ensure you apply the necessary patch. Note that the Symantec Messaging Gateway’s latest release is available to customers through normal support channels. For details on the patching process for Symantec Messaging Gateway, you can reference the following knowledge base article: http://www.symantec.com/docs/TECH246802
At this time, Symantec is not aware of any exploitations or adverse customer impact from these issues.
Best Practices
Symantec recommends the following measures to reduce risk of attack:
- Restrict access to administrative or management systems to authorized privileged users.
- Restrict remote access to trusted/authorized systems only.
- Run under the principle of least privilege, where possible, to limit the impact of potential exploit.
- Keep all operating systems and applications current with vendor patches.
- Follow a multi-layered approach to security. At a minimum, run both firewall and anti-malware applications to provide multiple points of detection and protection to both inbound and outbound threats.
- Deploy network and host-based intrusion detection systems to monitor network traffic for signs of anomalous or suspicious activity. This may aid in the detection of attacks or malicious activity related to the exploitation of latent vulnerabilities.
ACKNOWLEDGEMENTS
- Philip Pettersson: philip.pettersson@gmail.com (CVE-2017-6327)
- Dhiraj Mishra: mishra.dhiraj95@gmail.com (CVE-2017-6328)