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Vulnerability details: VCID-y1ps-qps1-qyhr
Vulnerability ID VCID-y1ps-qps1-qyhr
Aliases CVE-2019-9813
Summary Incorrect handling of \_\_proto\_\_ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write.
Status Published
Exploitability 2.0
Weighted Severity 9.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9813.json
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
epss 0.51921 https://api.first.org/data/v1/epss?cve=CVE-2019-9813
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2019-9813
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2019-9813
archlinux Critical https://security.archlinux.org/AVG-930
archlinux Critical https://security.archlinux.org/AVG-947
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-09
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-10
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-12
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2019:0966
https://access.redhat.com/errata/RHSA-2019:1144
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9813.json
https://api.first.org/data/v1/epss?cve=CVE-2019-9813
https://bugzilla.mozilla.org/show_bug.cgi?id=1538006
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9810
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9813
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2019-09/
https://www.mozilla.org/security/advisories/mfsa2019-10/
https://www.mozilla.org/security/advisories/mfsa2019-12/
1692182 https://bugzilla.redhat.com/show_bug.cgi?id=1692182
ASA-201903-14 https://security.archlinux.org/ASA-201903-14
ASA-201904-4 https://security.archlinux.org/ASA-201904-4
AVG-930 https://security.archlinux.org/AVG-930
AVG-947 https://security.archlinux.org/AVG-947
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:*:*:*:*:*:*:*:*
CVE-2019-9813 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1810
CVE-2019-9813 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/46646.txt
CVE-2019-9813 https://nvd.nist.gov/vuln/detail/CVE-2019-9813
mfsa2019-09 https://www.mozilla.org/en-US/security/advisories/mfsa2019-09
mfsa2019-10 https://www.mozilla.org/en-US/security/advisories/mfsa2019-10
mfsa2019-12 https://www.mozilla.org/en-US/security/advisories/mfsa2019-12
RHSA-2019:0671 https://access.redhat.com/errata/RHSA-2019:0671
RHSA-2019:0672 https://access.redhat.com/errata/RHSA-2019:0672
USN-3919-1 https://usn.ubuntu.com/3919-1/
USN-3927-1 https://usn.ubuntu.com/3927-1/
Data source Exploit-DB
Date added April 3, 2019
Description SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types (Type Confusion)
Ransomware campaign use Known
Source publication date April 3, 2019
Exploit type dos
Platform multiple
Source update date April 3, 2019
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1810
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9813.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:3.0/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-2019-9813
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:3.0/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-2019-9813
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 0.978
EPSS Score 0.51921
Published At July 31, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:57.120762+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2019/mfsa2019-10.yml 37.0.0