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CVE-2020-6797

MEDIUM
4.3
CVSS Score
Published: March 2, 2020 at 04:05 AM UTC
Updated: June 17, 2026 at 03:23 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR· also runs on 1 platform

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Severity
MEDIUM4.3
Exploit prediction
EPSS 1%

Description

By downloading a file with the .fileloc extension, a semi-privileged extension could launch an arbitrary application on the user's computer. The attacker is restricted as they are unable to download non-quarantined files or supply command line arguments to the application, limiting the impact. Note: this issue only occurs on Mac OSX. Other operating systems are unaffected. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 73v < ESR68.5
Affected range stops below 73, so it looks safe — our inference, not a vendor statement
Affected range stops below 73.0, so it looks safe — our inference, not a vendor statement
Affected range stops below ESR68.5, so it looks safe — our inference, not a vendor statement
apple-macos (environment)
Firefox ESR· Mozilla
95%
v < 68.5.0
Affected range stops below 68.5.0, so it looks safe — our inference, not a vendor statement
apple-macos (environment)
Thunderbird· Mozilla
95%
v < 68.5
Affected range stops below 68.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 68.5.0, so it looks safe — our inference, not a vendor statement
apple-macos (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (5)

x_refsource_MISCIssue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1596668
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202003-02
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-05/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-06/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-07/

CVSS

4.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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