VDB-142012 · CVE-2019-9719 · GCVE-0-2019-9719

libav 12.3 Subtitle Decoder libavcodec/srtdec.c srt_to_ass Video File buffer overflow ⚔ [Disputed]

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 labeled as critical has been found in libav 12.3. This affects the function srt_to_ass of the file libavcodec/srtdec.c of the component Subtitle Decoder. Executing a manipulation as part of Video File can lead to buffer overflow. This vulnerability is tracked as CVE-2019-9719. The attack can be launched remotely. No exploit exists. The presence of this vulnerability remains uncertain at this time.

Detailsinfo

A vulnerability classified as critical was found in libav 12.3 (Multimedia Player Software). This vulnerability affects the function srt_to_ass of the file libavcodec/srtdec.c of the component Subtitle Decoder. The manipulation as part of a Video File leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c misuses snprintf.

The weakness was disclosed 09/19/2019. This vulnerability was named CVE-2019-9719 since 03/12/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The real existence of this vulnerability is still doubted at the moment.

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

The entry VDB-142011 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Multimedia Player Software

Name

libav

Version

12.3

License

open-source

Website

Product: https://github.com/libav/libav/

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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💳	💳	💳	💳	💳	💳
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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: Buffer overflow
CWE: CWE-120 / CWE-119
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/12/2019 🔍
09/19/2019 +191 days 🔍
09/20/2019 +1 days 🔍
08/05/2024 +1780 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined
Disputed: 🔍

CVE: CVE-2019-9719 (🔍)
GCVE (CVE): GCVE-0-2019-9719
GCVE (VulDB): GCVE-100-142012
See also: 🔍

Entryinfo

Created: 09/20/2019 10:54
Updated: 08/05/2024 00:52
Changes: 09/20/2019 10:54 (38), 08/31/2020 12:45 (18), 12/26/2023 14:47 (3), 08/05/2024 00:52 (17)
Complete: 🔍
Cache ID: 216::103