libav up to 11.11/12.1 libavcodec/smacker.c build_table memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in libav up to 11.11/12.1. Impacted is the function build_table of the file libavcodec/smacker.c. Performing a manipulation results in memory corruption. This vulnerability was named CVE-2017-16803. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in libav up to 11.11/12.1 (Multimedia Player Software). This affects the function build_table of the file libavcodec/smacker.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.

The bug was discovered 11/15/2017. The weakness was presented 11/13/2017 as Bug 1098 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.libav.org. This vulnerability is uniquely identified as CVE-2017-16803 since 11/13/2017. It is possible to initiate the attack remotely. No form of authentication is needed for 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 scanner Nessus provides a plugin with the ID 119164 (GLSA-201811-19 : Libav: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176301 (Debian Security Update for libav (DSA 4119-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119164) and SecurityFocus (BID 101882†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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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Nessus ID: 119164
Nessus Name: GLSA-201811-19 : Libav: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831692
OpenVAS Name: Debian Security Advisory DSA 4119-1 (libav - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

11/13/2017 🔍
11/13/2017 +0 days 🔍
11/13/2017 +0 days 🔍
11/13/2017 +0 days 🔍
11/14/2017 +1 days 🔍
11/15/2017 +1 days 🔍
11/27/2018 +377 days 🔍
11/27/2018 +0 days 🔍
01/10/2023 +1505 days 🔍

Sourcesinfo

Product: github.com

Advisory: Bug 1098
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-16803 (🔍)
GCVE (CVE): GCVE-0-2017-16803
GCVE (VulDB): GCVE-100-109323

OVAL: 🔍

SecurityFocus: 101882 - Libav CVE-2017-16803 Denial of Service Vulnerability

Entryinfo

Created: 11/14/2017 14:19
Updated: 01/10/2023 09:52
Changes: 11/14/2017 14:19 (68), 12/06/2019 06:56 (15), 01/10/2023 09:52 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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