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CVE-2020-6799

Command line arguments could have been injected during Firefox invocation as a shell handler for...

8.8 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.53%Down 9.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used8.8

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.

Record
CVE-2020-6799
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
5.1 MediumAV:N/AC:H/Au:N/C:P/I:P/A:P
Weakness
CWE-88
Updated
2026-11-02
CVE ListNo score

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.

Record
CVE-2020-6799
Updated
2026-11-02
EUVDEUVD-2020-27946No score

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.

Record
EUVD-2020-27946
Updated
2026-11-03
GitHub AdvisoriesGHSA-8h3q-5823-cjpvNo score

Command line arguments could have been injected during Firefox invocation as a shell handler for...

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.

Record
GHSA-8h3q-5823-cjpv
Weakness
CWE-20, CWE-88
Updated
2026-11-02
OSVALPINE-CVE-2020-67998.8

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.

Record
ALPINE-CVE-2020-6799
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVopenSUSE-SU-2020:0230-1No score

Security update for MozillaFirefox

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.

Record
openSUSE-SU-2020:0230-1
Updated
2026-11-02
Show 5 moreShow less
OSVopenSUSE-SU-2024:10600-1No score

MozillaFirefox-92.0-1.2 on GA media

These are all security issues fixed in the MozillaFirefox-92.0-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10600-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:14572-1No score

firefox-esr-128.5.1-1.1 on GA media

These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14572-1
Updated
2026-11-02
OSVSUSE-SU-2020:0383-1No score

Security update for MozillaFirefox

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
Record
SUSE-SU-2020:0383-1
Updated
2026-11-02
OSVSUSE-SU-2020:0384-1No score

Security update for MozillaFirefox

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)
Record
SUSE-SU-2020:0384-1
Updated
2026-11-02
OSVSUSE-SU-2020:14290-1No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Firefox was updated to version 68.5.0 ESR (bsc#1163368).

Security issues fixed:

  • CVE-2020-6796: Fixed a missing bounds check on shared memory in the parent process (bsc#1163368).
  • CVE-2020-6798: Fixed a JavaScript code injection issue caused by the incorrect parsing of template tags (bsc#1163368).
  • CVE-2020-6799: Fixed a local arbitrary code execution issue when handling PDF links from other applications (bsc#1163368).
  • CVE-2020-6800: Fixed several memory safety bugs (bsc#1163368).

Non-security issues fixed:

  • Fixed various issues opening files with spaces in their path (bmo#1601905, bmo#1602726).
Record
SUSE-SU-2020:14290-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
firefox-esr
Alpine:v3.11
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.12
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.13
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.14
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.15
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.16
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.17
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.18
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.19
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.20
before 68.5.0-r0
68.5.0-r0
Show 29 moreShow less
Affected packages
PackageAffectedFixed
firefox-esr
Alpine:v3.21
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.22
before 68.5.0-r0
68.5.0-r0
firefox-esr
Alpine:v3.23
before 68.5.0-r0
68.5.0-r0
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15
From an advisory covering 5 CVEs
before 68.5.0-3.72.1
68.5.0-3.72.1
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15 SP1
From an advisory covering 5 CVEs
before 68.5.0-3.72.1
68.5.0-3.72.1
MozillaFirefox
SUSE:HPE Helion OpenStack 8
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:OpenStack Cloud 7
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:OpenStack Cloud 8
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:OpenStack Cloud Crowbar 8
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Desktop 12 SP4
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP1
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP2
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Software Development Kit 12 SP4
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP1-LTSS
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP2-LTSS
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP2-BCL
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP3-LTSS
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP3-BCL
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP4
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Enterprise Storage 5
From an advisory covering 5 CVEs
before 68.5.0-109.106.1
68.5.0-109.106.1
MozillaFirefox
SUSE:Linux Enterprise Server 11 SP4-LTSS
From an advisory covering 5 CVEs
before 68.5.0-78.61.2
68.5.0-78.61.2
MozillaFirefox
openSUSE:Leap 15.1
From an advisory covering 5 CVEs
before 68.5.0-lp151.2.30.1
68.5.0-lp151.2.30.1
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 661 CVEs
before 92.0-1.2
92.0-1.2
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 1860 CVEs
before 128.5.1-1.1
128.5.1-1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-6799 is a high vulnerability (CVSS 8.8) in Mozilla Firefox, published February 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.53%, the 75th percentile. Fixed in firefox-esr 68.5.0-r0.

References

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