CVE-2019-9809

Reference Links

• https://bugzilla.mozilla.org/show_bug.cgi?id=1282430
• https://bugzilla.mozilla.org/show_bug.cgi?id=1523249
• https://www.mozilla.org/security/advisories/mfsa2019-07/
• https://launchpad.net/bugs/cve/CVE-2019-9809
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9788
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9809
• https://security-tracker.debian.org/tracker/CVE-2019-9809
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9809
• https://nvd.nist.gov/vuln/detail/CVE-2019-9809
• https://ubuntu.com/security/CVE-2019-9809

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2019-07

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2019-9790
• CVE-2019-9791
• CVE-2019-9792
• CVE-2019-9793
• CVE-2019-9794
• CVE-2019-9795
• CVE-2019-9796
• CVE-2019-9797
• CVE-2019-9798
• CVE-2019-9799
• CVE-2019-9801
• CVE-2019-9802
• CVE-2019-9803
• CVE-2019-9804
• CVE-2019-9805
• CVE-2019-9806
• CVE-2019-9807
• CVE-2019-9809
• CVE-2019-9808
• CVE-2019-9789
• CVE-2019-9788

Frequently Asked Questions

• What is CVE-2019-9809?

  CVE-2019-9809 is a vulnerability that allows for a denial of service (DOS) attack by triggering a series of modal alert messages through invalid credentials or locations when the source for resources on a page is through an FTP connection.

• Which software is affected by CVE-2019-9809?

  Mozilla Firefox versions up to and excluding 66.0, as well as Ubuntu and Debian packages of Firefox versions up to and excluding 66.0, are affected by CVE-2019-9809.

• What is the severity of CVE-2019-9809?

  CVE-2019-9809 has a severity rating of high with a CVSS score of 7.5.

• How can I fix CVE-2019-9809?

  To fix CVE-2019-9809, upgrade to Mozilla Firefox version 66.0 or later, or update your Ubuntu or Debian Firefox package to version 66.0 or later.

• Where can I find more information about CVE-2019-9809?

  More information about CVE-2019-9809 can be found at the following references: [Bugzilla #1282430](https://bugzilla.mozilla.org/show_bug.cgi?id=1282430), [Bugzilla #1523249](https://bugzilla.mozilla.org/show_bug.cgi?id=1523249), [Mozilla Security Advisories MFSB2019-07](https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/).