CVE-2019-11728

Description

The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded. This vulnerability affects Firefox < 68.

Category

4.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.45%
Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2019-21/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1552993 issue tracking permissions required vendor advisory
https://security.gentoo.org/glsa/201908-12 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11728?
CVE-2019-11728 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11728?
To fix CVE-2019-11728, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11728 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-11728 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11728?
CVE-2019-11728 affects Mozilla Firefox.
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