Commits on Dec 6, 2022

1. [20.10] update to go1.18.9 …

   Includes security fixes for net/http (CVE-2022-41717, CVE-2022-41720),
   and os (CVE-2022-41720).
   
   These minor releases include 2 security fixes following the security policy:
   
   - os, net/http: avoid escapes from os.DirFS and http.Dir on Windows
   
     The os.DirFS function and http.Dir type provide access to a tree of files
     rooted at a given directory. These functions permitted access to Windows
     device files under that root. For example, os.DirFS("C:/tmp").Open("COM1")
     would open the COM1 device.
     Both os.DirFS and http.Dir only provide read-only filesystem access.
   
     In addition, on Windows, an os.DirFS for the directory \(the root of the
     current drive) can permit a maliciously crafted path to escape from the
     drive and access any path on the system.
   
     The behavior of os.DirFS("") has changed. Previously, an empty root was
     treated equivalently to "/", so os.DirFS("").Open("tmp") would open the
     path "/tmp". This now returns an error.
   
     This is CVE-2022-41720 and Go issue https://go.dev/issue/56694.
   
   - net/http: limit canonical header cache by bytes, not entries
   
     An attacker can cause excessive memory growth in a Go server accepting
     HTTP/2 requests.
   
     HTTP/2 server connections contain a cache of HTTP header keys sent by
     the client. While the total number of entries in this cache is capped,
     an attacker sending very large keys can cause the server to allocate
     approximately 64 MiB per open connection.
   
     This issue is also fixed in golang.org/x/net/http2 vX.Y.Z, for users
     manually configuring HTTP/2.
   
     Thanks to Josselin Costanzi for reporting this issue.
   
     This is CVE-2022-41717 and Go issue https://go.dev/issue/56350.
   
   View the release notes for more information:
   https://go.dev/doc/devel/release#go1.18.9
   
   And the milestone on the issue tracker:
   https://github.com/golang/go/issues?q=milestone%3AGo1.18.9+label%3ACherryPickApproved
   
   Full diff: golang/go@go1.18.8...go1.18.9
   
   The golang.org/x/net fix is in golang/net@1e63c2f
   
   Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

   

   thaJeztah committed Dec 6, 2022
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