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go1.20.8 (released 2023-09-06) includes two security fixes to the html/template package, as well as bug fixes to the compiler, the go command, the runtime, and the crypto/tls, go/types, net/http, and path/filepath packages. See the Go 1.20.8 milestone on our issue tracker for details:
https://github.com/golang/go/issues?q=milestone%3AGo1.20.8+label%3ACherryPickApproved
full diff: golang/go@go1.20.7...go1.20.8
From the security mailing:
[security] Go 1.21.1 and Go 1.20.8 are released
Hello gophers,
We have just released Go versions 1.21.1 and 1.20.8, minor point releases.
These minor releases include 4 security fixes following the security policy:
cmd/go: go.mod toolchain directive allows arbitrary execution The go.mod toolchain directive, introduced in Go 1.21, could be leveraged to execute scripts and binaries relative to the root of the module when the "go" command was executed within the module. This applies to modules downloaded using the "go" command from the module proxy, as well as modules downloaded directly using VCS software.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-39320 and Go issue https://go.dev/issue/62198.
html/template: improper handling of HTML-like comments within script contexts The html/template package did not properly handle HMTL-like "" comment tokens, nor hashbang "#!" comment tokens, in <script> contexts. This may cause the template parser to improperly interpret the contents of <script> contexts, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack.
Thanks to Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.) for reporting this issue.
This is CVE-2023-39318 and Go issue https://go.dev/issue/62196.
html/template: improper handling of special tags within script contexts The html/template package did not apply the proper rules for handling occurrences of "<script", "<!--", and "</script" within JS literals in <script> contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack.
Thanks to Takeshi Kaneko (GMO Cybersecurity by Ierae, Inc.) for reporting this issue.
This is CVE-2023-39319 and Go issue https://go.dev/issue/62197.
crypto/tls: panic when processing post-handshake message on QUIC connections Processing an incomplete post-handshake message for a QUIC connection caused a panic.
Thanks to Marten Seemann for reporting this issue.
This is CVE-2023-39321 and CVE-2023-39322 and Go issue https://go.dev/issue/62266.