SARA / Free Tools / CVE / CVE-2023-3436

CVE-2023-3436 — Xpdf 4

Xpdf 4.04 will deadlock on a PDF object stream whose "Length" field is itself in another object stream.

CVSS

3.3 LOW

EPSS

2.00% (top 96.60%)

CWE

CWE-833

Published

2023-06-27T20:55:21.049Z

Last modified

2024-11-07T17:00:22.993Z

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

01What is this vulnerability?

Xpdf 4.04 will deadlock on a PDF object stream whose "Length" field is itself in another object stream.

Vendor	Product	Versions
Xpdf	Xpdf	4.04

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

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.

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

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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

Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.