vulnwire
5.5med

CVE-2016-20099

L-SMASH through 2.14.5 Infinite Loop in VC-1 Importer Probe

Published 23 d ago · modified 21 d ago · JSON

CVSS
5.5
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.2%
percentile 15%
Public exploits
0
none known

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.

CISA SSVC assessment

Exploitation
Proof of concept public
Automatable
no
Technical impact
partial
Assessed
23 d ago

Exploit prediction (EPSS)

0.24% probability of exploitation in the next 30 days, higher than 15% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA4.06.8CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA3.15.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA4.06.8CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA3.15.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • l-smash l-smash

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

  • github.com /l-smash/l-smash/pull/58 · patch, issue-tracking
  • github.com /l-smash/l-smash/blob/v2.14.5/importer/vc1_imp.c#L462-L488 · technical-description
  • hackmd.io /@haind-pwn/l-smash-hevc-importer-double-free · third-party-advisory
  • vulncheck.com /advisories/l-smash-through-2.14.5-infinite-loop-in-vc-1-importer-probe · third-party-advisory
  • hackmd.io /@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free · exploit

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.