Fixes the following security issues:
- cmd/go: cgo code injection
The go command may generate unexpected code at build time when using cgo.
This may result in unexpected behavior when running a go program which
uses cgo.
This may occur when running an untrusted module which contains directories
with newline characters in their names. Modules which are retrieved using
the go command, i.e. via "go get", are not affected (modules retrieved
using GOPATH-mode, i.e. GO111MODULE=off, may be affected).
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-29402 and Go issue https://go.dev/issue/60167.
- runtime: unexpected behavior of setuid/setgid binaries
The Go runtime didn't act any differently when a binary had the
setuid/setgid bit set. On Unix platforms, if a setuid/setgid binary was
executed with standard I/O file descriptors closed, opening any files
could result in unexpected content being read/written with elevated
prilieges. Similarly if a setuid/setgid program was terminated, either
via panic or signal, it could leak the contents of its registers.
Thanks to Vincent Dehors from Synacktiv for reporting this issue.
This is CVE-2023-29403 and Go issue https://go.dev/issue/60272.
- cmd/go: improper sanitization of LDFLAGS
The go command may execute arbitrary code at build time when using cgo.
This may occur when running "go get" on a malicious module, or when
running any other command which builds untrusted code. This is can by
triggered by linker flags, specified via a "#cgo LDFLAGS" directive.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
This is CVE-2023-29404 and CVE-2023-29405 and Go issues
https://go.dev/issue/60305 and https://go.dev/issue/60306.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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