Use-after-free in ffmpeg (Alpine package)
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-13904 |
| CWE-ID | CWE-416 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
ffmpeg (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Use-after-free
EUVDB-ID: #VU29635
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2020-13904
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in FFmpeg when processing a crafted EXTINF duration in an m3u8 file because parse_playlist in
libavformat/hls.c frees a pointer, and later that pointer is accessed in
av_probe_input_format3 in libavformat/format.c. A remote attacker can trick the victim to open a specially crafted media file or playlist, trigger a use-after-free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsffmpeg (Alpine package): 0.5-r0 - 4.1.5-r0
ffmpeg (Alpine package):
CPE2.3- cpe:2.3:o:alpine:ffmpeg_alpine_package:0.5-r0:*:*:*:*:alpine_linux:*:1.9
- cpe:2.3:o:alpine:ffmpeg_alpine_package:2.1.4-r0:*:*:*:*:alpine_linux:*:2.6
- cpe:2.3:o:alpine:ffmpeg_alpine_package:2.1.5-r0:*:*:*:*:alpine_linux:*:2.6
- cpe:2.3:o:alpine:ffmpeg_alpine_package::*:*:*:*:alpine_linux:*:*
https://git.alpinelinux.org/aports/commit/?id=f3d13d27653687516adefe66adbfd239dee57f2e
https://git.alpinelinux.org/aports/commit/?id=477aae6b2f690ba8a89cbd18587c96bb0ff40548
https://git.alpinelinux.org/aports/commit/?id=228dc16f637162cbf1a241b4f1d71606ba5e8888
https://git.alpinelinux.org/aports/commit/?id=a06541424702380d7a111b112c981b1e09910bae
https://git.alpinelinux.org/aports/commit/?id=2a2f5de5a32743832ff7162605d6dfafe6fbd022
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
