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CVE-2019-17021

MEDIUM
5.3
CVSS Score
Published: January 8, 2020 at 09:29 PM UTC
Updated: June 17, 2026 at 02:23 AM UTC
3 products affected across 2 vendorsFirefoxLeapFirefox ESR· also runs on 1 platform

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%

Description

During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Affected

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

Firefox· Mozilla
95%
v < 72
Affected range stops below 72, so it looks safe — our inference, not a vendor statement
Affected range stops below 72.0, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Firefox ESR· Mozilla
95%
v < 68.4
Affected range stops below 68.4, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Leap· openSUSEdrupal
95%
15.1

Runs on — not affected

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

References (7)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00043.html
x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html
x_refsource_MISCExploitIssue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1599008
Mailing Listx_refsource_BUGTRAQThird Party Advisory
Source: [email protected]
https://seclists.org/bugtraq/2020/Jan/18
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-01/
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-02/

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362

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