libav 12.3 AAC File vc1_block.c vc1_decode_i_block_adv memory corruption

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 (≈)
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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.
6.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in libav 12.3. This issue affects the function vc1_decode_i_block_adv of the file vc1_block.c of the component AAC File Handler. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-18828. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in libav 12.3 (Multimedia Player Software). It has been rated as critical. Affected by this issue is the function vc1_decode_i_block_adv of the file vc1_block.c of the component AAC File Handler. 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:

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

The bug was discovered 10/29/2018. The weakness was disclosed 10/29/2018 (Website). The advisory is shared for download at bugzilla.libav.org. This vulnerability is handled as CVE-2018-18828 since 10/28/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 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.

The entries VDB-126150 and VDB-126151 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/28/2018 🔍
10/29/2018 +0 days 🔍
10/29/2018 +0 days 🔍
10/30/2018 +0 days 🔍
10/31/2018 +1 days 🔍
04/07/2020 +524 days 🔍

Sourcesinfo

Advisory: bugzilla.libav.org
Status: Not defined

CVE: CVE-2018-18828 (🔍)
GCVE (CVE): GCVE-0-2018-18828
GCVE (VulDB): GCVE-100-126152
See also: 🔍

Entryinfo

Created: 10/31/2018 06:17
Updated: 04/07/2020 18:51
Changes: 10/31/2018 06:17 (59), 04/07/2020 18:51 (1)
Complete: 🔍
Cache ID: 216::103

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