CVE-2019-13574 — In lib/mini_magick/image

In lib/mini_magick/image.rb in MiniMagick before 4.9.4, a fetched remote image filename could cause remote command execution because Image.open input is directly passed to Kernel#open, which accepts a '|' character followed by a command.

01What is this vulnerability?

In lib/mini_magick/image.rb in MiniMagick before 4.9.4, a fetched remote image filename could cause remote command execution because Image.open input is directly passed to Kernel#open, which accepts a '|' character followed by a command.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-12T02:31:25.000Z
• Last modified: 2024-08-04T23:57:39.417Z

09References

• github.com — https://github.com/minimagick/minimagick/releases/tag/v4.9.4
• github.com — https://github.com/minimagick/minimagick/commit/4cd5081e58810d3394d27a67219e8e4e…
• github.com — https://github.com/minimagick/minimagick/compare/d484786...293f9bb
• benjamin-bouchet.com — https://benjamin-bouchet.com/blog/vulnerabilite-dans-la-gem-mini_magick-version-…
• www.debian.org — https://www.debian.org/security/2019/dsa-4481
• seclists.org — https://seclists.org/bugtraq/2019/Jul/20
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/10/msg00007.html