CVE-2023-31568Public exploit

Application crash via undersized encryption dictionary strings

Published May 10, 2023 · Updated Jan 27, 2025

Heap buffer overflow in PoDoFo 0.10.0 allows remote attackers to crash a PDF-processing application via a crafted encrypted PDF. During encryption-dictionary parsing, PdfEncryptRC4 uses memcpy to read 32 bytes from an /O or /U string whose heap allocation can contain only 31 bytes. Exploitation requires an application to process the attacker-supplied file; the published proof of concept aborts podofopdfinfo under AddressSanitizer.

CVSS severity8.8
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in PoDoFo 0.10.0 allows remote attackers to crash a PDF-processing application via a crafted encrypted PDF. During encryption-dictionary parsing, PdfEncryptRC4 uses memcpy to read 32 bytes from an /O or /U string whose heap allocation can contain only 31 bytes. Exploitation requires an application to process the attacker-supplied file; the published proof of concept aborts podofopdfinfo under AddressSanitizer.

The record

CVE
CVE-2023-31568
Published
May 10, 2023
Updated
Jan 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. May 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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