SARA / Free Tools / KEV / CVE-2021-22204

CVE-2021-22204 on CISA KEV

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

CISA KEV — Actively Exploited

ExifTool Remote Code Execution Vulnerability

Vendor / Product
— / Perl / Exiftool
Added to KEV
2021-11-17
BOD 22-01 due
2021-12-01
Ransomware use
Unknown
CVSS / EPSS
6.8 MEDIUM · EPSS 92.76%

01What CISA says about this vulnerability

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

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
ExifToolExifTool>=7.44, <12.24

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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