Vulnerabilities > CVE-2020-6799 - Argument Injection or Modification vulnerability in Mozilla Firefox
Summary
Command line arguments could have been injected during Firefox invocation as a shell handler for certain unsupported file types. This required Firefox to be configured as the default handler for a given file type and for a file downloaded to be opened in a third party application that insufficiently sanitized URL data. In that situation, clicking a link in the third party application could have been used to retrieve and execute files whose location was supplied through command line arguments. Note: This issue only affects Windows operating systems and when Firefox is configured as the default handler for non-default filetypes. Other operating systems are unaffected. This vulnerability affects Firefox < 73 and Firefox < ESR68.5.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Try All Common Application Switches and Options An attacker attempts to invoke all common switches and options in the target application for the purpose of discovering weaknesses in the target. For example, in some applications, adding a --debug switch causes debugging information to be displayed, which can sometimes reveal sensitive processing or configuration information to an attacker. This attack differs from other forms of API abuse in that the attacker is blindly attempting to invoke options in the hope that one of them will work rather than specifically targeting a known option. Nonetheless, even if the attacker is familiar with the published options of a targeted application this attack method may still be fruitful as it might discover unpublicized functionality.
- Using Meta-characters in E-mail Headers to Inject Malicious Payloads This type of attack involves an attacker leveraging meta-characters in email headers to inject improper behavior into email programs. Email software has become increasingly sophisticated and feature-rich. In addition, email applications are ubiquitous and connected directly to the Web making them ideal targets to launch and propagate attacks. As the user demand for new functionality in email applications grows, they become more like browsers with complex rendering and plug in routines. As more email functionality is included and abstracted from the user, this creates opportunities for attackers. Virtually all email applications do not list email header information by default, however the email header contains valuable attacker vectors for the attacker to exploit particularly if the behavior of the email client application is known. Meta-characters are hidden from the user, but can contain scripts, enumerations, probes, and other attacks against the user's system.
- HTTP Parameter Pollution (HPP) An attacker overrides or adds HTTP GET/POST parameters by injecting query string delimiters. Via HPP it may be possible to override existing hardcoded HTTP parameters, modify the application behaviors, access and, potentially exploit, uncontrollable variables, and bypass input validation checkpoints and WAF rules.
- OS Command Injection In this type of an attack, an adversary injects operating system commands into existing application functions. An application that uses untrusted input to build command strings is vulnerable. An adversary can leverage OS command injection in an application to elevate privileges, execute arbitrary commands and compromise the underlying operating system.
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-230.NASL description This update for MozillaFirefox fixes the following issues : - Firefox Extended Support Release 68.5.0 ESR - Fixed: Various stability and security fixes - Mozilla Firefox ESR68.5 MFSA 2020-06 (bsc#1163368) - CVE-2020-6796 (bmo#1610426) Missing bounds check on shared memory read in the parent process - CVE-2020-6797 (bmo#1596668) Extensions granted downloads.open permission could open arbitrary applications on Mac OSX - CVE-2020-6798 (bmo#1602944) Incorrect parsing of template tag could result in JavaScript injection - CVE-2020-6799 (bmo#1606596) Arbitrary code execution when opening pdf links from other applications, when Firefox is configured as default pdf reader - CVE-2020-6800 (bmo#1595786, bmo#1596706, bmo#1598543, bmo#1604851, bmo#1605777, bmo#1608580, bmo#1608785) Memory safety bugs fixed in Firefox 73 and Firefox ESR 68.5 This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-05-09 modified 2020-02-18 plugin id 133759 published 2020-02-18 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133759 title openSUSE Security Update : MozillaFirefox (openSUSE-2020-230) NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-0383-1.NASL description This update for MozillaFirefox fixes the following issues : Firefox Extended Support Release 68.5.0 ESR - Fixed: Various stability and security fixes Mozilla Firefox ESR68.5 MFSA 2020-06 (bsc#1163368) - CVE-2020-6796 (bmo#1610426) Missing bounds check on shared memory read in the parent process - CVE-2020-6797 (bmo#1596668) Extensions granted downloads.open permission could open arbitrary applications on Mac OSX - CVE-2020-6798 (bmo#1602944) Incorrect parsing of template tag could result in JavaScript injection - CVE-2020-6799 (bmo#1606596) Arbitrary code execution when opening pdf links from other applications, when Firefox is configured as default pdf reader - CVE-2020-6800 (bmo#1595786, bmo#1596706, bmo#1598543, bmo#1604851, bmo#1605777, bmo#1608580, bmo#1608785) Memory safety bugs fixed in Firefox 73 and Firefox ESR 68.5 Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-09 modified 2020-02-18 plugin id 133761 published 2020-02-18 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133761 title SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:0383-1) NASL family Windows NASL id MOZILLA_FIREFOX_68_5_ESR.NASL description The version of Firefox installed on the remote Windows host is prior to 68.5. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-06 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-09 modified 2020-02-13 plugin id 133677 published 2020-02-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133677 title Mozilla Firefox ESR < 68.5 Multiple Vulnerabilities NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-202003-02.NASL description The remote host is affected by the vulnerability described in GLSA-202003-02 (Mozilla Firefox: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Mozilla Firefox. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could entice a user to view a specially crafted web page, possibly resulting in the execution of arbitrary code with the privileges of the process or a Denial of Service condition. Furthermore, a remote attacker may be able to perform Man-in-the-Middle attacks, obtain sensitive information, spoof the address bar, conduct clickjacking attacks, bypass security restrictions and protection mechanisms, or have other unspecified impact. Workaround : There is no known workaround at this time. last seen 2020-05-08 modified 2020-03-13 plugin id 134469 published 2020-03-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134469 title GLSA-202003-02 : Mozilla Firefox: Multiple vulnerabilities NASL family Windows NASL id MOZILLA_FIREFOX_73_0.NASL description The version of Firefox installed on the remote Windows host is prior to 73.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-05 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-09 modified 2020-02-14 plugin id 133693 published 2020-02-14 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133693 title Mozilla Firefox < 73.0 NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2020-042-01.NASL description New mozilla-firefox packages are available for Slackware 14.2 and -current to fix security issues. last seen 2020-05-09 modified 2020-02-12 plugin id 133642 published 2020-02-12 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133642 title Slackware 14.2 / current : mozilla-firefox (SSA:2020-042-01) NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-0384-1.NASL description This update for MozillaFirefox fixes the following issues : Firefox Extended Support Release 68.5.0 ESR - CVE-2020-6796 (bmo#1610426) Missing bounds check on shared memory read in the parent process - CVE-2020-6797 (bmo#1596668) Extensions granted downloads.open permission could open arbitrary applications on Mac OSX - CVE-2020-6798 (bmo#1602944) Incorrect parsing of template tag could result in JavaScript injection - CVE-2020-6799 (bmo#1606596) Arbitrary code execution when opening pdf links from other applications, when Firefox is configured as default pdf reader - CVE-2020-6800 (bmo#1595786, bmo#1596706, bmo#1598543, bmo#1604851, bmo#1605777, bmo#1608580, bmo#1608785) Memory safety bugs fixed in Firefox 73 and Firefox ESR 68.5 - Fixed: Fixed various issues opening files with spaces in their path (bmo#1601905, bmo#1602726) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-09 modified 2020-02-18 plugin id 133762 published 2020-02-18 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133762 title SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:0384-1)