SB2018110747 - Buffer over-read in nginx (Alpine package)
Published: November 7, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer over-read (CVE-ID: CVE-2018-16845)
The vulnerability allows a remote attacker to gain access to potentially sensitive information or trigger denial of service conditions.
The vulnerability exists due to a boundary condition when processing headers of MP4 files within the ngx_http_mp4_module module. A remote attacker can create a specially crafted MP4 file, trick the victim into uploading it on the server and trigger application crash or disclosure of the worker's process memory.
Successful exploitation of the vulnerability requires that nginx is compiled with support for ngx_http_mp4_module module (not a default configuration).
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=820edddd99fb21127b48d61ab5bcf8705d1b03b6
- https://git.alpinelinux.org/aports/commit/?id=e86a2a9f72ca3473b25cd7ae7085d79c368615b0
- https://git.alpinelinux.org/aports/commit/?id=6b75c937d616093cfc19f88eb23252e393cc3307
- https://git.alpinelinux.org/aports/commit/?id=e104e0f441e5234364ca25e6467d1b1e30766f17