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Vulnerability details: VCID-j16j-tet9-aaaj
Vulnerability ID VCID-j16j-tet9-aaaj
Aliases CVE-2020-21688
Summary A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 7.9
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00290 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00290 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
epss 0.00624 https://api.first.org/data/v1/epss?cve=CVE-2020-21688
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2020-21688
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-21688
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-21688
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-21688
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20445
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20446
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20450
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20453
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20891
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20892
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20896
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21688
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21697
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-22037
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-22042
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3566
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38114
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38171
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38291
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://trac.ffmpeg.org/ticket/8186
https://www.debian.org/security/2021/dsa-4998
cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2020-21688 https://nvd.nist.gov/vuln/detail/CVE-2020-21688
USN-5472-1 https://usn.ubuntu.com/5472-1/
USN-USN-5167-1 https://usn.ubuntu.com/USN-5167-1/
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://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-2020-21688
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-2020-21688
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-2020-21688
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 0.46714
EPSS Score 0.00262
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.