CVE-2019-18378 Cross-site scripting in Symantec Messaging Gateway

What is CVE-2019-18378?

CVE-2019-18378 is a medium-severity cross-site scripting vulnerability in Symantec Messaging Gateway, published on 11 Dec 2019. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Symantec Messaging Gateway, prior to 10.7.3, may be susceptible to a cross-site scripting (XSS) exploit, which is a type of issue that can enable attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to potentially bypass access controls such as the same-origin policy.

Weakness: CWE-79

Which versions are affected by CVE-2019-18378?

It affects 1 product.

Products include Symantec Messaging Gateway.

How do I fix CVE-2019-18378?

No fix has been published for CVE-2019-18378 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2019-18378 being exploited?

There is no known exploitation of CVE-2019-18378 in the wild and no public exploit code.

Other vulnerabilities in Symantec Messaging Gateway

• CVE-2017-6326 Code injection in Messaging Gateway Critical 10.0
• CVE-2018-12242 Auth bypass in Symantec Messaging Gateway Critical 9.8
• CVE-2018-12243 XML external entity in Symantec Messaging Gateway High 8.8
• CVE-2016-2204 Command injection in n/a High 8.2
• CVE-2012-3579 Hardcoded credentials in n/a High 7.9

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r4mf-29c6-hhqm.