CVE-2023-33802

MEDIUM

SumatraPDF 3.4.6 - Denial of Service via Crafted Text File

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-33802. PoCs published by CDACesec.

AI-analyzed exploit summary This repository documents a Denial of Service (DoS) vulnerability in SumatraPDF 3.4.6 32-bit, triggered by opening two large text files. The crash occurs due to a null pointer dereference in the `CrashMe` function, leading to an access violation.

Description

A buffer overflow in SumatraPDF Reader v3.4.6 allows attackers to cause a Denial of Service (DoS) via a crafted text file.

Exploits (1)

nomisec WRITEUP 3 stars
by CDACesec · poc
https://github.com/CDACesec/CVE-2023-33802

This repository documents a Denial of Service (DoS) vulnerability in SumatraPDF 3.4.6 32-bit, triggered by opening two large text files. The crash occurs due to a null pointer dereference in the `CrashMe` function, leading to an access violation.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: SumatraPDF 3.4.6 32-bit
No auth needed
Prerequisites: SumatraPDF 3.4.6 32-bit installed · Two large text files
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit, Third Party Advisory
https://github.com/CDACesec/CVE-2023-33802

Scores

CVSS v3 5.5
EPSS 0.0029
EPSS Percentile 20.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
sumatrapdfreader/sumatrapdf 3.4.6
Published Jul 26, 2023
Tracked Since Feb 18, 2026