CVE-2017-7833: Input Validation

Reference Links

• https://bugzilla.mozilla.org/show_bug.cgi?id=1370497
• https://www.mozilla.org/security/advisories/mfsa2017-24/
• http://www.securityfocus.com/bid/101832
• http://www.securitytracker.com/id/1039803
• https://launchpad.net/bugs/cve/CVE-2017-7833
• https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/
• https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/#CVE-2017-7840
• https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/#CVE-2017-7833
• https://security-tracker.debian.org/tracker/CVE-2017-7833
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7833
• https://nvd.nist.gov/vuln/detail/CVE-2017-7833
• https://ubuntu.com/security/CVE-2017-7833

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2017-24

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2017-7828
• CVE-2017-7830
• CVE-2017-7831
• CVE-2017-7832
• CVE-2017-7833
• CVE-2017-7834
• CVE-2017-7835
• CVE-2017-7836
• CVE-2017-7837
• CVE-2017-7838
• CVE-2017-7839
• CVE-2017-7840
• CVE-2017-7842
• CVE-2017-7827
• CVE-2017-7826

Frequently Asked Questions

• What is CVE-2017-7833?

  CVE-2017-7833 is a vulnerability that allows Arabic and Indic vowel marker characters to be combined with Latin characters in a domain name, allowing for domain spoofing attacks.

• How does CVE-2017-7833 work?

  CVE-2017-7833 allows the non-Latin character in a domain name to be hidden from most viewers, enabling domain spoofing attacks.

• What software is affected by CVE-2017-7833?

  Mozilla Firefox version up to and excluding 57.0.2, and certain versions of Ubuntu and Debian with Firefox.

• What is the severity of CVE-2017-7833?

  CVE-2017-7833 has a severity rating of 5.3, which is considered medium.

• How can I fix CVE-2017-7833?

  Upgrade to Mozilla Firefox version 57.0.2 or above, or follow the provided remedies for Ubuntu and Debian versions.