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Vulnerability details: VCID-k47k-sds2-e7e3
Vulnerability ID VCID-k47k-sds2-e7e3
Aliases CVE-2019-11740
Summary Mozilla developers and community members Tyson Smith and Nathan Froyd 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787 Out-of-bounds Write
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11740.json
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
epss 0.00861 https://api.first.org/data/v1/epss?cve=CVE-2019-11740
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2019-11740
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2019-11740
archlinux High https://security.archlinux.org/AVG-1036
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-26
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2019-27
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2019-29
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2019-30
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11740.json
https://api.first.org/data/v1/epss?cve=CVE-2019-11740
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1563133%2C1573160
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11739
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11740
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11742
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11743
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11744
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11746
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11752
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9812
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/201911-07
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://www.mozilla.org/security/advisories/mfsa2019-26/
https://www.mozilla.org/security/advisories/mfsa2019-27/
https://www.mozilla.org/security/advisories/mfsa2019-29/
https://www.mozilla.org/security/advisories/mfsa2019-30/
1748652 https://bugzilla.redhat.com/show_bug.cgi?id=1748652
ASA-201909-2 https://security.archlinux.org/ASA-201909-2
AVG-1036 https://security.archlinux.org/AVG-1036
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
CVE-2019-11740 https://nvd.nist.gov/vuln/detail/CVE-2019-11740
mfsa2019-25 https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
mfsa2019-26 https://www.mozilla.org/en-US/security/advisories/mfsa2019-26
mfsa2019-27 https://www.mozilla.org/en-US/security/advisories/mfsa2019-27
mfsa2019-29 https://www.mozilla.org/en-US/security/advisories/mfsa2019-29
mfsa2019-30 https://www.mozilla.org/en-US/security/advisories/mfsa2019-30
RHSA-2019:2663 https://access.redhat.com/errata/RHSA-2019:2663
RHSA-2019:2694 https://access.redhat.com/errata/RHSA-2019:2694
RHSA-2019:2729 https://access.redhat.com/errata/RHSA-2019:2729
RHSA-2019:2773 https://access.redhat.com/errata/RHSA-2019:2773
RHSA-2019:2774 https://access.redhat.com/errata/RHSA-2019:2774
RHSA-2019:2807 https://access.redhat.com/errata/RHSA-2019:2807
USN-4122-1 https://usn.ubuntu.com/4122-1/
USN-4150-1 https://usn.ubuntu.com/4150-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11740.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11740
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11740
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.74112
EPSS Score 0.00861
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:58.137055+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2019/mfsa2019-27.yml 37.0.0