Two vulnerabilities have been reported in nginx, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.
1) An error exists when processing URLs in the "ngx_http_parse_complex_uri()" function. This can be exploited to cause a buffer underflow via a specially crafted request and may allow execution of arbitrary code.
The vulnerability is reported in versions prior to 0.7.62, 0.6.39, and 0.5.38.
2) A NULL-pointer dereference error in the "ngx_http_process_request_headers()" function can be exploited to crash the worker process and e.g. interrupt existing HTTP sessions by requesting an overly long URL.
The vulnerability is confirmed in version 0.7.61. Other versions may also be affected.
Solution: Update to version 0.7.62, 0.6.39, or 0.5.38.
Provided and/or discovered by: 1) The vendor credits Chris Ries.
2) zeus penguin
Original Advisory: 1) http://marc.info/?l=nginx&m=125293592526306&w=2
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
information to email@example.com
Subject: nginx Buffer Underflow and Denial of Service Vulnerabilities
No posts yet
You must be logged in to post a comment.
Secunia Customer Login
Not a customer already?
Learn more about how our market leading Vulnerability Management solutions can help you manage risk and ensure compliance.