VDB-133857 · CVE-2019-11338 · BID 108034

FFmpeg 4.1.2 libavcodec/hevcdec.c HEVC Data null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in FFmpeg 4.1.2 and classified as problematic. This impacts an unknown function of the file libavcodec/hevcdec.c. Performing a manipulation as part of HEVC Data results in null pointer dereference. This vulnerability is reported as CVE-2019-11338. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in FFmpeg 4.1.2 (Multimedia Processing Software). This affects an unknown part of the file libavcodec/hevcdec.c. The manipulation as part of a HEVC Data leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

libavcodec/hevcdec.c in FFmpeg 4.1.2 mishandles detection of duplicate first slices, which allows remote attackers to cause a denial of service (NULL pointer dereference and out-of-array access) or possibly have unspecified other impact via crafted HEVC data.

The bug was discovered 03/23/2019. The weakness was disclosed 04/19/2019 (Website). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2019-11338 since 04/18/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197450 (Ubuntu Security Notification for Ffmpeg Vulnerabilities (USN-3967-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 108034†). The entries VDB-123171, VDB-131583, VDB-131582 and VDB-133858 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Multimedia Processing Software

Name

FFmpeg

Version

4.1.2

License

open-source

Website

Product: https://ffmpeg.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

03/23/2019 🔍
04/18/2019 +26 days 🔍
04/18/2019 +0 days 🔍
04/19/2019 +1 days 🔍
04/20/2019 +1 days 🔍
09/04/2023 +1598 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: 54655623a82632e7624714d7b2a3e039dc5faa7e⛔
Status: Confirmed

CVE: CVE-2019-11338 (🔍)
GCVE (CVE): GCVE-0-2019-11338
GCVE (VulDB): GCVE-100-133857
SecurityFocus: 108034 - FFmpeg CVE-2019-11338 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 04/20/2019 07:01
Updated: 09/04/2023 21:50
Changes: 04/20/2019 07:01 (60), 05/31/2020 09:37 (4), 09/04/2023 21:39 (4), 09/04/2023 21:50 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.