libav 12.2 libavcodec/vc1_mc.c ff_vc1_mc_4mv_chroma4 null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
6.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in libav 12.2 and classified as problematic. The impacted element is the function ff_vc1_mc_4mv_chroma4 of the file libavcodec/vc1_mc.c. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2017-17129. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in libav 12.2 (Multimedia Player Software) and classified as problematic. This issue affects the function ff_vc1_mc_4mv_chroma4 of the file libavcodec/vc1_mc.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

The ff_vc1_mc_4mv_chroma4 function in libavcodec/vc1_mc.c in Libav 12.2 allows remote attackers to cause a denial of service (segmentation fault and application crash) or possibly have unspecified other impact via a crafted file.

The bug was discovered 11/17/2017. The weakness was presented 12/04/2017 (Website). It is possible to read the advisory at bugzilla.libav.org. The identification of this vulnerability is CVE-2017-17129 since 12/04/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 vulnerability was handled as a non-public zero-day exploit for at least 17 days. During that time the estimated underground price was around $0-$5k.

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

See VDB-110184, VDB-110182 and VDB-110181 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 8.8
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: 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/17/2017 🔍
12/04/2017 +17 days 🔍
12/04/2017 +0 days 🔍
12/04/2017 +0 days 🔍
12/04/2017 +0 days 🔍
12/12/2019 +738 days 🔍

Sourcesinfo

Advisory: bugzilla.libav.org
Status: Not defined

CVE: CVE-2017-17129 (🔍)
GCVE (CVE): GCVE-0-2017-17129
GCVE (VulDB): GCVE-100-110183
See also: 🔍

Entryinfo

Created: 12/04/2017 15:06
Updated: 12/12/2019 08:24
Changes: 12/04/2017 15:06 (58), 12/12/2019 08:24 (1)
Complete: 🔍
Cache ID: 216::103

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

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