CVE-2021-22204

medium KEV

Published 2021-11-17 · Modified 2021-11-17

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

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

Vendor: Perl
Product: Exiftool
Due date: 2021-12-01

Predictions

Exploit likelihood

99%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-50911 local linux

UNICORD · 2022-05-11

ExifTool 12.23 - Arbitrary Code Execution

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_multi/http/gitlab_exif_rce rank 600

GitLab Unauthenticated Remote ExifTool Command Injection

Source fetch failed: fetch_error — view the original via the link above.

exploit_unix/fileformat/exiftool_djvu_ant_perl_injection rank 600

ExifTool DjVu ANT Perl injection

Source fetch failed: fetch_error — view the original via the link above.

OS impact

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`12.25-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`12.16+dfsg-2`
sid	Fixed	`12.16+dfsg-2`
forky	Fixed	`12.16+dfsg-2`
bullseye	Fixed	`12.16+dfsg-2`
bookworm	Fixed	`12.16+dfsg-2`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.