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CVE-2016-20099— L-SMASH through 2.14.5 Infinite Loop in VC-1 Importer Probe

Quick assessment

Affected
l-smash l-smash
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

L-SMASH 2.14.5 及更早版本中，importer/vc1_imp.c 文件中的 vc1_importer_probe() 函数存在无限循环漏洞。攻击者可通过构造特殊的输入文件，导致应用程序挂起。具体而言，攻击者可以提供仅包含零字节（0x00）的文件，该文件会被 lsmash_read_file() 自动探测和处理，从而引发持续 CPU 资源消耗，最终导致拒绝服务（DoS）。

CVSS 5.5 · Medium EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
l-smash l-smash ≤ 2.14.5 affected
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I. Basic Information for CVE-2016-20099

Vulnerability Information
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Vulnerability Title
L-SMASH through 2.14.5 Infinite Loop in VC-1 Importer Probe
Source: CVE Program / CVE List V5
Vulnerability Description
L-SMASH through 2.14.5 contains an infinite loop vulnerability in vc1_importer_probe() in importer/vc1_imp.c that allows attackers to hang applications via crafted input files. Attackers can supply a file consisting only of zero bytes, which lsmash_read_file() probes automatically, causing indefinite CPU consumption and denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
l-smash l-smash 0 ~ 2.14.5 -

II. Public POCs for CVE-2016-20099

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III. Intelligence Information for CVE-2016-20099

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Patches & Fixes for CVE-2016-20099 (1)

Other References for CVE-2016-20099 (3)

IV. Related Vulnerabilities

Same product: l-smash
Same vendor: l-smash
Same weakness: CWE-835

V. Comments for CVE-2016-20099

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