FFmpeg up to 3.1.2 libavcodec/exr.c decode_block memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in FFmpeg up to 3.1.2. This impacts the function decode_block of the file libavcodec/exr.c. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2016-6920. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FFmpeg up to 3.1.2 (Multimedia Processing Software). Affected by this issue is the function decode_block of the file libavcodec/exr.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in the decode_block function in libavcodec/exr.c in FFmpeg before 3.1.3 allows remote attackers to cause a denial of service (application crash) via vectors involving tile positions.

The bug was discovered 09/07/2016. The weakness was disclosed 01/23/2017 by Security Team (Website). The advisory is shared for download at git.videolan.org. This vulnerability is handled as CVE-2016-6920 since 08/23/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 138 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 3.1.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92664†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FFmpeg 3.1.3
Patch: 79f52a0dbd484aad111e4bf4a4f7047c7ceb6137

Timelineinfo

08/23/2016 🔍
08/25/2016 +2 days 🔍
09/07/2016 +13 days 🔍
01/23/2017 +138 days 🔍
01/23/2017 +0 days 🔍
01/24/2017 +1 days 🔍
05/14/2026 +3397 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: 138618
Researcher: Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6920 (🔍)
GCVE (CVE): GCVE-0-2016-6920
GCVE (VulDB): GCVE-100-95852
SecurityFocus: 92664 - FFmpeg CVE-2016-6920 Heap Buffer Overflow Vulnerability
OSVDB: - CVE-2016-6920 - FFmpeg - Buffer Overflow Issue

Entryinfo

Created: 01/24/2017 08:33
Updated: 05/14/2026 15:34
Changes: 01/24/2017 08:33 (60), 07/30/2020 16:57 (7), 11/03/2022 09:37 (5), 05/14/2026 15:34 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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