FFmpeg 0.5 vorbis_dec.c numeric error

CVSS Meta Temp Score
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CTI Interest Score
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9.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in FFmpeg 0.5. The impacted element is an unknown function of the file vorbis_dec.c. Executing a manipulation can lead to numeric error. The identification of this vulnerability is CVE-2009-4633. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in FFmpeg 0.5 (Multimedia Processing Software). It has been declared as very critical. This vulnerability affects an unknown code block of the file vorbis_dec.c. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

vorbis_dec.c in FFmpeg 0.5 uses an assignment operator when a comparison operator was intended, which might allow remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted file that modifies a loop counter and triggers a heap-based buffer overflow.

The issue has been introduced in 03/02/2010. The weakness was shared 02/09/2010 by Will Dormann (Website). The advisory is shared for download at roundup.ffmpeg.org. This vulnerability was named CVE-2009-4633 since 02/09/2010. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/30/2026).

It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 44864 (Debian DSA-2000-1 : ffmpeg-debian - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195089 (Ubuntu Security Notification for FFmpeg, Ffmpeg-debian Vulnerabilities (USN-931-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 8857.

The vulnerability is also documented in the databases at Tenable (44864), SecurityFocus (BID 36465†), Secunia (SA36805†) and Vulnerability Center (SBV-24963†). The entries VDB-9123, VDB-9124, VDB-9126 and VDB-9128 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.1

VulDB Base Score: 10.0
VulDB Temp Score: 9.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 44864
Nessus Name: Debian DSA-2000-1 : ffmpeg-debian - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 66953
OpenVAS Name: Debian Security Advisory DSA 2000-1 (ffmpeg-debian)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍

Timelineinfo

09/21/2009 🔍
09/21/2009 +0 days 🔍
09/21/2009 +0 days 🔍
02/09/2010 +141 days 🔍
02/09/2010 +0 days 🔍
02/09/2010 +0 days 🔍
03/02/2010 +21 days 🔍
03/02/2010 +0 days 🔍
03/18/2015 +1842 days 🔍
04/30/2026 +4061 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: roundup.ffmpeg.org
Researcher: Will Dormann
Status: Not defined

CVE: CVE-2009-4633 (🔍)
GCVE (CVE): GCVE-0-2009-4633
GCVE (VulDB): GCVE-100-51784

OVAL: 🔍

SecurityFocus: 36465 - FFmpeg Version 0.5 Multiple Remote Vulnerabilities
Secunia: 36805 - ffmpeg Multiple Vulnerabilities, Moderately Critical
Vulnerability Center: 24963 - FFmpeg 0.5 Heap Based Buffer Overflow Remote Code Execution or DoS Vulnerability, Critical
Vupen: ADV-2010-0935

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 04/30/2026 16:19
Changes: 03/18/2015 15:15 (60), 02/21/2017 17:25 (19), 09/01/2021 07:50 (2), 04/30/2026 16:19 (20)
Complete: 🔍
Cache ID: 216::103

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