SB2017120741 - Resource exhaustion in ffmpeg (Alpine package)
Published: December 7, 2017
Security Bulletin ID
SB2017120741
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2017-14223)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
In libavformat/asfdec_f.c in FFmpeg 3.3.3, a DoS in asf_build_simple_index() due to lack of an EOF (End of File) check might cause huge CPU consumption. When a crafted ASF file, which claims a large "ict" field in the header but does not contain sufficient backing data, is provided, the for loop would consume huge CPU and memory resources, since there is no EOF check inside the loop.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=b1cb7063482eddce57992920a78e763bb3f8eea7
- https://git.alpinelinux.org/aports/commit/?id=beb6c402470c5f9bc5bcd17d8b57bfbd52785ec6
- https://git.alpinelinux.org/aports/commit/?id=48e351c55b295e4281b7bc1b8a0223bc878c1bf3
- https://git.alpinelinux.org/aports/commit/?id=1012b905bec72936b78cbe2de9cff631fc0b695b