CVE-2023-28428 — PDFio is a C library for reading and writing PDF files

PDFio is a C library for reading and writing PDF files. In versions 1.1.0 and prior, a denial of service vulnerability exists in the pdfio parser. Crafted pdf files can cause the program to run at 100% utilization and never terminate. This is different from CVE-2023-24808. A patc

01What is this vulnerability?

PDFio is a C library for reading and writing PDF files. In versions 1.1.0 and prior, a denial of service vulnerability exists in the pdfio parser. Crafted pdf files can cause the program to run at 100% utilization and never terminate. This is different from CVE-2023-24808. A patch for this issue is available in version 1.1.1.

02Affected products

Vendor	Product	Versions
michaelrsweet	pdfio	<= 1.1.0

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: 2023-03-20T14:51:43.619Z
• Last modified: 2025-02-25T14:52:33.971Z

09References

• github.com — https://github.com/michaelrsweet/pdfio/security/advisories/GHSA-68x8-9phf-j7jf
• github.com — https://github.com/michaelrsweet/pdfio/commit/97d4955666779dc5b0665e15dd951a5c12…