CVE-2020-12405
MEDIUM
5.3
CVSS Score
Published: July 9, 2020 at 02:45 PM UTC
Updated: June 17, 2026 at 02:51 AM UTC
4 products affected across 2 vendorsUbuntu LinuxFirefoxThunderbird
Using Thunderbird by Mozilla?
Get instant alerts when new vulnerabilities affect Thunderbird - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
Description
When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%v < 77v < 77.0
Affected range stops below 77, so it looks safe — our inference, not a vendor statement
Affected range stops below 77.0, so it looks safe — our inference, not a vendor statement
v < 68.9v < 68.9.0
Affected range stops below 68.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 68.9.0, so it looks safe — our inference, not a vendor statement
v < 68.9.0
Affected range stops below 68.9.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (5)
x_refsource_MISCExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1631618Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4421-1/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-20/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-21/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-22/CVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-362CWE-416
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card