CVE-2022-34037

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

Withdrawn Advisory

This advisory has been withdrawn because it is a bug, not a vulnerability. According to the maintainer, the bug only affects the client side of the request and cannot cause a denial of service on the server.

Original Description

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) on the client side via a crafted URI.

Withdrawn Advisory

This advisory has been withdrawn because it is a bug, not a vulnerability. According to the maintainer, the bug only affects the client side of the request and cannot cause a denial of service on the server.

Original Description

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) on the client side via a crafted URI.

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

This update for caddy fixes the following issues:

Update to version 2.5.2:

• admin: expect quoted ETags (#4879)
• headers: Only replace known placeholders (#4880)
• reverseproxy: Err 503 if all upstreams unavailable
• reverseproxy: Adjust new TLS Caddyfile directive names (#4872)
• fileserver: Use safe redirects in file browser
• admin: support ETag on config endpoints (#4579)
• caddytls: Reuse issuer between PreCheck and Issue (#4866)
• admin: Implement /adapt endpoint (close #4465) (#4846)
• forwardauth: Fix case when copy_headers is omitted (#4856)
• Expose several Caddy HTTP Matchers to the CEL Matcher (#4715)
• reverseproxy: Fix double headers in response handlers (#4847)
• reverseproxy: Fix panic when TLS is not configured (#4848)
• reverseproxy: Skip TLS for certain configured ports (#4843)
• forwardauth: Support renaming copied headers, block support (#4783)
• Add comment about xcaddy to main
• headers: Support wildcards for delete ops (close #4830) (#4831)
• reverseproxy: Dynamic ServerName for TLS upstreams (#4836)
• reverseproxy: Make TLS renegotiation optional
• reverseproxy: Add renegotiation param in TLS client (#4784)
• caddyhttp: Log error from CEL evaluation (fix #4832)
• reverseproxy: Correct the tls_server_name docs (#4827)
• reverseproxy: HTTP 504 for upstream timeouts (#4824)
• caddytls: Make peer certificate verification pluggable (#4389)
• reverseproxy: api: Remove misleading 'healthy' value
• Fix #4822 and fix #4779
• reverseproxy: Add --internal-certs CLI flag #3589 (#4817)
• ci: Fix build caching on Windows (#4811)
• templates: Add humanize function (#4767)
• core: Micro-optim in run() (#4810)
• httpcaddyfile: Add {err.*} placeholder shortcut (#4798)
• templates: Documentation consistency (#4796)
• chore: Bump quic-go to v0.27.0 (#4782)
• reverseproxy: Support http1.1>h2c (close #4777) (#4778)
• rewrite: Handle fragment before query (fix #4775) [boo#1201822, CVE-2022-34037]
• httpcaddyfile: Support multiple values for default_bind (#4774)

These are all security issues fixed in the caddy-2.5.2-2.1 package on the GA media of openSUSE Tumbleweed.