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Vulnerability details: VCID-t8tw-9efw-aaar
Vulnerability ID VCID-t8tw-9efw-aaar
Aliases CVE-2020-15656
Summary JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Status Published
Exploitability 0.5
Weighted Severity 8.4
Risk 4.2
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-15656.html
rhas Important https://access.redhat.com/errata/RHSA-2020:3555
rhas Important https://access.redhat.com/errata/RHSA-2020:3557
rhas Important https://access.redhat.com/errata/RHSA-2020:3559
rhas Important https://access.redhat.com/errata/RHSA-2020:4080
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15656.json
epss 0.00538 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00538 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00538 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00538 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00573 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.00669 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
epss 0.01817 https://api.first.org/data/v1/epss?cve=CVE-2020-15656
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1861646
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15656
cvssv3.1 5.6 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 9.3 https://nvd.nist.gov/vuln/detail/CVE-2020-15656
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-15656
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-15656
archlinux High https://security.archlinux.org/AVG-1213
archlinux High https://security.archlinux.org/AVG-1214
generic_textual Medium https://ubuntu.com/security/notices/USN-4443-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-30
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2020-30/#CVE-2020-15656
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-32
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-33
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2020-33/#CVE-2020-15656
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-15656.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15656.json
https://api.first.org/data/v1/epss?cve=CVE-2020-15656
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15656
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://ubuntu.com/security/notices/USN-4443-1
https://usn.ubuntu.com/4443-1/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-30/#CVE-2020-15656
https://www.mozilla.org/en-US/security/advisories/mfsa2020-33/#CVE-2020-15656
https://www.mozilla.org/security/advisories/mfsa2020-30/
https://www.mozilla.org/security/advisories/mfsa2020-32/
https://www.mozilla.org/security/advisories/mfsa2020-33/
1861646 https://bugzilla.redhat.com/show_bug.cgi?id=1861646
AVG-1213 https://security.archlinux.org/AVG-1213
AVG-1214 https://security.archlinux.org/AVG-1214
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:20.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
CVE-2020-15656 https://nvd.nist.gov/vuln/detail/CVE-2020-15656
mfsa2020-30 https://www.mozilla.org/en-US/security/advisories/mfsa2020-30
mfsa2020-32 https://www.mozilla.org/en-US/security/advisories/mfsa2020-32
mfsa2020-33 https://www.mozilla.org/en-US/security/advisories/mfsa2020-33
RHSA-2020:3555 https://access.redhat.com/errata/RHSA-2020:3555
RHSA-2020:3557 https://access.redhat.com/errata/RHSA-2020:3557
RHSA-2020:3559 https://access.redhat.com/errata/RHSA-2020:3559
RHSA-2020:4080 https://access.redhat.com/errata/RHSA-2020:4080
No exploits are available.
Vector: CVSS:3.1/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-2020-15656.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:N/S:U/C:L/I:L/A:L 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:C/I:C/A:C Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15656
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-2020-15656
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15656
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 0.77070
EPSS Score 0.00538
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.