libav up to 11.11/12.1 libavcodec/smacker.c build_table memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.7 | $0-$5k | 0.00 |
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 vulnerability database at Tenable (119164).
Product
Type
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.9VulDB 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: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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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 Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: github.com
Timeline
11/13/2017 🔍11/13/2017 🔍
11/13/2017 🔍
11/13/2017 🔍
11/14/2017 🔍
11/15/2017 🔍
11/27/2018 🔍
11/27/2018 🔍
01/10/2023 🔍
Sources
Advisory: Bug 1098Status: Not defined
Confirmation: 🔍
CVE: CVE-2017-16803 (🔍)
OVAL: 🔍
SecurityFocus: 101882 - Libav CVE-2017-16803 Denial of Service Vulnerability
Entry
Created: 11/14/2017 14:19Updated: 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: 🔍
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