Ffmpeg/Libav libavcodec/h264dec.c init_get_bits Return Value null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Ffmpeg and Libav. The affected element is the function init_get_bits of the file libavcodec/h264dec.c. This manipulation as part of Return Value causes null pointer dereference. This vulnerability is handled as CVE-2017-1000460. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Ffmpeg and Libav (Multimedia Processing Software) (version now known) and classified as problematic. Affected by this vulnerability is the function init_get_bits of the file libavcodec/h264dec.c. The manipulation as part of a Return Value leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In line libavcodec/h264dec.c:500 in libav(v13_dev0), ffmpeg(n3.4), chromium(56 prior Feb 13, 2017), the return value of init_get_bits is ignored and get_ue_golomb(&gb) is called on an uninitialized get_bits context, which causes a NULL deref exception.

The bug was discovered 01/03/2018. The weakness was released 01/03/2018 by Paul (Website). It is possible to read the advisory at bugzilla.libav.org. This vulnerability is known as CVE-2017-1000460 since 01/03/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 176766 (Debian Security Update for libav (DLA 1740-1)).

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 104896†). Entries connected to this vulnerability are available at VDB-76807, VDB-106026, VDB-112644 and VDB-122085. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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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: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/03/2018 🔍
01/03/2018 +0 days 🔍
01/03/2018 +0 days 🔍
01/03/2018 +0 days 🔍
01/04/2018 +1 days 🔍
07/23/2018 +200 days 🔍
01/20/2023 +1642 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: DLA 1740-1
Researcher: Paul Ch (Paul)
Status: Confirmed

CVE: CVE-2017-1000460 (🔍)
GCVE (CVE): GCVE-0-2017-1000460
GCVE (VulDB): GCVE-100-111271
SecurityFocus: 104896 - FFmpeg Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 01/04/2018 07:28
Updated: 01/20/2023 06:42
Changes: 01/04/2018 07:28 (61), 12/29/2019 09:46 (4), 01/28/2021 11:36 (3), 01/20/2023 06:42 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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