Vulnerability Monitor

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CVE-2019-11740

Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR 68, and Firefox 60.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 5 products from mozilla, from mozilla, from mozilla and 2 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-09-27T18:15:11.770

Last Modified

2025-11-25T17:50:16.803

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 60.9.0	Yes
Application	mozilla	firefox	< 69.0	Yes
Application	mozilla	firefox_esr	< 68.1.0	Yes
Application	mozilla	thunderbird	< 60.9.0	Yes
Application	mozilla	thunderbird	< 68.1.0	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	19.04	Yes
Operating System	opensuse	leap	15.0	Yes
Operating System	opensuse	leap	15.1	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html Mailing List, Third Party Advisory ([email protected])
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1563133%2C1573160 Issue Tracking, Not Applicable, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/201911-07 Third Party Advisory ([email protected])
https://usn.ubuntu.com/4150-1/ Third Party Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-25/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-26/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-27/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-29/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-30/ Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1563133%2C1573160 Issue Tracking, Not Applicable, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201911-07 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4150-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-25/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-26/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-27/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-29/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-30/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mozilla's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.