SB2021060735 - Integer overflow in nginx

Description

This security bulletin contains information about 1 security vulnerability.

1) Integer overflow (CVE-ID: CVE-2017-20005)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the ngx_gmtime() function when processing dates within the autoindex module. A remote attacker with the ability to pass a file to the server with a specially crafted timestamp with a year prior to 1970 and after the year 10000, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://github.com/nginx/nginx/commit/b900cc28fcbb4cf5a32ab62f80b59292e1c85b4b
• https://trac.nginx.org/nginx/ticket/1368
• https://github.com/nginx/nginx/commit/0206ebe76f748bb39d9de4dd4b3fce777fdfdccf
• http://nginx.org/en/CHANGES
• https://lists.debian.org/debian-lts-announce/2021/06/msg00009.html
• https://security.netapp.com/advisory/ntap-20210805-0006/