Known exploited vulnerability
CVE-2021-22204
The short answer
CVE-2021-22204 affects ExifTool ExifTool and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-17: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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
Weakness: CWE-94.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 17, 2021
Federal due date Dec 1, 2021
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
ExifTool. NVD's record lists the exact affected versions.
References
- github.com/exiftool/exiftool/commit/cf0f4e7dcd024ca99615bfd1102a841a25dde031#diff-fa0d652d10dbcd246e6b1df16c1e992931d3bb717a7e36157596b76bdadb3800 Patch
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22204.json Third Party Advisory
- hackerone.com/reports/1154542 ExploitIssue TrackingThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/05/msg00018.html Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDKDLJLBTBBR66OOPXSXCG2PQRM5KCZL/ Release Notes
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6UOBPU3LSHAPRRJNISNVXZ5DSUIALLV/ Release Notes
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U4RF6PJCJ6NQOVJJJF6HN6BORUQVIXY6/ Release Notes
- www.debian.org/security/2021/dsa-4910 Mailing ListThird Party Advisory
- github.com/exiftool/exiftool/commit/cf0f4e7dcd024ca99615bfd1102a841a25dde031#diff-fa0d652d10dbcd246e6b1df16c1e992931d3bb717a7e36157596b76bdadb3800 Patch
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22204.json Third Party Advisory
- hackerone.com/reports/1154542 ExploitIssue TrackingThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/05/msg00018.html Mailing ListThird Party Advisory
Questions
Is CVE-2021-22204 being exploited?
Yes. CISA added CVE-2021-22204 to its Known Exploited Vulnerabilities catalog on 2021-11-17, with a federal remediation due date of 2021-12-01.
How do I fix CVE-2021-22204?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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