CVE-2023-50447 — Pillow through 10

Pillow through 10.1.0 allows PIL.ImageMath.eval Arbitrary Code Execution via the environment parameter, a different vulnerability than CVE-2022-22817 (which was about the expression parameter).

01What is this vulnerability?

Pillow through 10.1.0 allows PIL.ImageMath.eval Arbitrary Code Execution via the environment parameter, a different vulnerability than CVE-2022-22817 (which was about the expression parameter).

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

08Timeline

• Published: 2024-01-19T00:00:00.000Z
• Last modified: 2024-08-02T22:16:46.654Z

09References

• github.com — https://github.com/python-pillow/Pillow/releases
• devhub.checkmarx.com — https://devhub.checkmarx.com/cve-details/CVE-2023-50447/
• www.openwall.com — http://www.openwall.com/lists/oss-security/2024/01/20/1
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2024/01/msg00019.html
• duartecsantos.github.io — https://duartecsantos.github.io/2024-01-02-CVE-2023-50447/