CVE-2020-8450

An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy...

CVE-2020-8450

CVE-2020-8450 affects Squid prior to 4.10, caused by incorrect buffer management in reverse-proxy mode, allowing a remote client to trigger a buffer overflow. Connected advisories confirm a fix was released (e.g., updates to Squid 4.11+/4.10-era patches) across multiple distributions (CloudLinux,...

CVE-2020-8450

An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy...

Catastrophic backtracking in regex allows Denial of Service in Waitress

Impact When waitress receives a header that contains invalid characters it will cause the regular expression engine to catastrophically backtrack causing the process to use 100% CPU time and blocking any other interactions. This would allow an attacker to send a single request with an invalid...

PT-2020-2568

Name of the Vulnerable Software and Affected Versions Squid versions prior to 4.10 Description An issue was discovered due to incorrect buffer management, allowing a remote client to cause a buffer overflow in a Squid instance acting as a reverse proxy. This can potentially impact the...

CVE-2020-8450: Incorrect Calculation of Buffer Size

An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy...

InspIRCd websocket module double free vulnerability

The InspIRCd development team reports: The websocket module before v3.8.1 contains a double free vulnerability. When combined with a HTTP reverse proxy this vulnerability can be used by any user who is GKZ-lined to remotely crash an InspIRCd server...

CVE-2011-3621

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSEPROXY is enabled...

Authentication flaw

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSEPROXY is enabled...

CVE-2011-3621

The CVE-2011-3621 entry concerns a reverse proxy handling flaw in FluxBB prior to 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled. The description is supported by the NVD entry, which lists a CVSS2 base score of 7.5 (HIGH) and a CVSS3.1 base score of 9.8 (CRITICAL), indicating a potentially seve...

CVE-2011-3621

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSEPROXY is enabled...

CVE-2011-3621

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSEPROXY is enabled...

CVE-2011-3621: Undefined Security Weakness

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSEPROXY is enabled...

PT-2020-7126

Name of the Vulnerable Software and Affected Versions FluxBB versions prior to 1.4.7 Description A reverse proxy issue exists when the FORUM BEHIND REVERSE PROXY setting is enabled. Recommendations For versions prior to 1.4.7, update to version 1.4.7 or later to resolve the issue. As a temporary...

Internet Bug Bounty: Squid as reverse proxy RCE and data leak

Summary: This was a very difficult experience as Squid maintainers took a long time to answer. I tried getting help from HackerOne support, Dropbox support and the Internet Bug Bounty never e-mailed me back to no avail. What could have taken a few days took months. The vulnerability concerns a...

Content Delivery Networks handle HTTP headers in different and unexpected ways

Overview A Content Delivery Network CDN is a distributed network of proxy servers that deliver web content collected from a back end web server using a temporary local storage called a cache. HTTP cache poisoning is a type of attack that allows a remote attacker to inject arbitrary content using...

CVE-2018-12122

It was found that Node.js HTTP server was vulnerable to a Slowloris type attack. An attacker could make long lived connections by sending bytes very slowly to the server, saturating its resource and possibly resulting in a denial of service. Mitigation The use of a Load Balancer or a Reverse Prox...

HTTP Request Smuggling: Invalid whitespace characters in headers in Waitress

Impact If a proxy server is used in front of waitress, an invalid request may be sent by an attacker that bypasses the front-end and is parsed differently by waitress leading to a potential for HTTP request smuggling. Content-Length: 10 Transfer-Encoding: \x0bchunked For clarity: 0x0b == vertical...

HTTP Request Smuggling: Content-Length Sent Twice in Waitress

Impact Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. So a request with: Content-Length: 10 Content-Length: 10 would get transformed to: Content-Length: 10, 10 Whic...

HTTP Request Smuggling: LF vs CRLF handling in Waitress

Impact Waitress implemented a "MAY" part of the RFC7230 https://tools.ietf.org/html/rfc7230section-3.5 which states: Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR...