Skip to content
OpenAdvisories
Unscored Public exploit CVE-2017-7783 EUVD-2017-16758GHSA-ch5f-5368-9hw8

If a long user name is used in a username/password combination in a site URL (such as " http://UserName:Password@example.com"), the resulti…

Published Jun 11, 2018 · Updated Aug 5, 2024 · Assigned by mozilla

Vendor: Mozilla Product: Firefox Package: firefox Package: mozjs38 Category: Browsers Ecosystem: Ubuntu

Description

If a long user name is used in a username/password combination in a site URL (such as " http://UserName:Password@example.com"), the resulting modal prompt will hang in a non-responsive state or crash, causing a denial of service. This vulnerability affects Firefox < 55.

Affected products

VendorProductAffectedFixed
Mozilla Firefox unspecified – < 55 55

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS mozjs38 No fix yet —
Ubuntu 16.04 LTS firefox 55.0.1+build2-0ubuntu0.16.04.2 USN-3391-1
Ubuntu 14.04 LTS firefox 55.0.1+build2-0ubuntu0.14.04.2 USN-3391-1

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed MozillaFirefox 92.0-1.2 openSUSE-SU-2024:10600-1
openSUSE Tumbleweed firefox-esr 128.5.1-1.1 openSUSE-SU-2024:14572-1

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 4

References