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CVE-2019-11758

HIGH
8.8
CVSS Score
Published: January 8, 2020 at 07:28 PM UTC
Updated: June 17, 2026 at 02:13 AM UTC
4 products affected across 2 vendorsUbuntu LinuxFirefoxThunderbird

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Severity
HIGH8.8
Exploit prediction
EPSS 1%

Description

Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed. This bug showed evidence of memory corruption in the accessibility engine and we presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.2, and Firefox ESR < 68.2.

Affected

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

Ubuntu Linux· Canonicalrubygems
95%
16.04
Firefox· Mozilla
95%
v < 69v < 69.0
Affected range stops below 69, so it looks safe — our inference, not a vendor statement
Affected range stops below 69.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 68.2
Affected range stops below 68.2, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 68.2
Affected range stops below 68.2, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_CONFIRMExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1536227
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4335-1/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-25/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-33/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-35/

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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