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Vulnerability details: VCID-bezh-f5pq-8kcb
Vulnerability ID VCID-bezh-f5pq-8kcb
Aliases CVE-2020-6831
Summary A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash.
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-2020-6831.json
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
epss 0.1015 https://api.first.org/data/v1/epss?cve=CVE-2020-6831
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-6831
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-6831
archlinux Critical https://security.archlinux.org/AVG-1148
archlinux High https://security.archlinux.org/AVG-1149
archlinux Critical https://security.archlinux.org/AVG-1155
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2020-16
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2020-17
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2020-18
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.html
http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6831.json
https://api.first.org/data/v1/epss?cve=CVE-2020-6831
https://bugzilla.mozilla.org/show_bug.cgi?id=1632241
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12387
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12392
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12395
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12397
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6423
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6430
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6431
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6432
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6433
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6434
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6435
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6436
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6437
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6438
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6439
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6440
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6441
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6442
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6443
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6444
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6445
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6446
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6447
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6448
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6454
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6455
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6456
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6457
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6458
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6459
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6460
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6461
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6462
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6463
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6464
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6465
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6466
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6467
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6468
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6469
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6470
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6471
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6472
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6473
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6474
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6475
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6476
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6478
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6479
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6480
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6481
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6482
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6483
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6484
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6485
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6486
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6487
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6488
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6489
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6490
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6491
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6492
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6493
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6494
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6495
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6496
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6497
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6498
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6505
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6506
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6507
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6509
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6831
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202005-03
https://security.gentoo.org/glsa/202005-04
https://www.debian.org/security/2020/dsa-4714
https://www.mozilla.org/security/advisories/mfsa2020-16/
https://www.mozilla.org/security/advisories/mfsa2020-17/
https://www.mozilla.org/security/advisories/mfsa2020-18/
1831763 https://bugzilla.redhat.com/show_bug.cgi?id=1831763
ASA-202005-2 https://security.archlinux.org/ASA-202005-2
ASA-202005-3 https://security.archlinux.org/ASA-202005-3
ASA-202005-7 https://security.archlinux.org/ASA-202005-7
AVG-1148 https://security.archlinux.org/AVG-1148
AVG-1149 https://security.archlinux.org/AVG-1149
AVG-1155 https://security.archlinux.org/AVG-1155
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:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
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:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
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:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
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-2020-6831 https://nvd.nist.gov/vuln/detail/CVE-2020-6831
mfsa2020-16 https://www.mozilla.org/en-US/security/advisories/mfsa2020-16
mfsa2020-17 https://www.mozilla.org/en-US/security/advisories/mfsa2020-17
mfsa2020-18 https://www.mozilla.org/en-US/security/advisories/mfsa2020-18
RHSA-2020:2031 https://access.redhat.com/errata/RHSA-2020:2031
RHSA-2020:2032 https://access.redhat.com/errata/RHSA-2020:2032
RHSA-2020:2033 https://access.redhat.com/errata/RHSA-2020:2033
RHSA-2020:2036 https://access.redhat.com/errata/RHSA-2020:2036
RHSA-2020:2037 https://access.redhat.com/errata/RHSA-2020:2037
RHSA-2020:2046 https://access.redhat.com/errata/RHSA-2020:2046
RHSA-2020:2047 https://access.redhat.com/errata/RHSA-2020:2047
RHSA-2020:2048 https://access.redhat.com/errata/RHSA-2020:2048
RHSA-2020:2049 https://access.redhat.com/errata/RHSA-2020:2049
RHSA-2020:2050 https://access.redhat.com/errata/RHSA-2020:2050
RHSA-2020:2064 https://access.redhat.com/errata/RHSA-2020:2064
USN-4353-1 https://usn.ubuntu.com/4353-1/
USN-4373-1 https://usn.ubuntu.com/4373-1/
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-2020-6831.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:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6831
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:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6831
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 0.92787
EPSS Score 0.1015
Published At Aug. 10, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:39.485147+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-18.yml 37.0.0