CVE-2021-44957

MEDIUM

ffjpeg < 2021-01-01 - Denial of Service via jfif_encode Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-44957. PoCs published by cemonatk.

AI-analyzed exploit summary This repository contains a detailed technical analysis of CVE-2021-44957, a global buffer overflow vulnerability in ffjpeg. The writeup includes a description of the vulnerability, reproduction steps, and an AddressSanitizer output demonstrating the overflow in the jfif_encode function.

Description

Global buffer overflow vulnerability exist in ffjpeg through 01.01.2021. It is similar to CVE-2020-23705. Issue is in the jfif_encode function at ffjpeg/src/jfif.c (line 708) could cause a Denial of Service by using a crafted jpeg file.

Exploits (1)

github WRITEUP 3 stars
by cemonatk · poc
https://github.com/cemonatk/onefuzzyway/tree/main/CVEs/ffjpeg/CVE-2021-44957.md

This repository contains a detailed technical analysis of CVE-2021-44957, a global buffer overflow vulnerability in ffjpeg. The writeup includes a description of the vulnerability, reproduction steps, and an AddressSanitizer output demonstrating the overflow in the jfif_encode function.

Classification
Writeup 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: ffjpeg through 01.01.2021
No auth needed
Prerequisites: crafted JPEG file · ffjpeg compiled with AddressSanitizer
devstral-2 · analyzed Apr 29, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/rockcarry/ffjpeg/issues/44

Scores

CVSS v3 6.5
EPSS 0.0081
EPSS Percentile 52.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-120
Status published
Products (1)
rockcarry/ffjpeg < 2021-01-01
Published Feb 08, 2022
Tracked Since Feb 18, 2026