What is CVE-2021-22204?

CVE-2021-22204 is a medium-severity vulnerability in Exiftool, classified under Code Injection. CVSS score: 6.8/10. Published 2021-04-23.

How severe is CVE-2021-22204?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2021-22204 known to be exploited?

Yes. CVE-2021-22204 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-17), indicating it is being actively exploited. 105 public proof-of-concept repositories are indexed.

RCE in Exiftool

CVE-2021-22204

Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious image

Vulnerability class: RCE (Remote Code Execution)

EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

Affected products

Exiftool — versions >=7.44, <12.24
Exiftool_project Exiftool
Debian Debian_linux — versions 9.0, 10.0
Fedoraproject Fedora — versions 32, 33, 34

Weakness classification (CWE)

CWE-94 — Code Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-17. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2021-12-01.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

cve@gitlab.com (Patch, x_refsource_MISC)
cve@gitlab.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@gitlab.com (x_refsource_CONFIRM, Third Party Advisory)
cve@gitlab.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_DEBIAN)
cve@gitlab.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
cve@gitlab.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
cve@gitlab.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
cve@gitlab.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@gitlab.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@gitlab.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-22204?: CVE-2021-22204 is a medium-severity vulnerability in Exiftool, classified under Code Injection. CVSS score: 6.8/10. Published 2021-04-23.
How severe is CVE-2021-22204?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2021-22204 known to be exploited?: Yes. CVE-2021-22204 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-17), indicating it is being actively exploited. 105 public proof-of-concept repositories are indexed.