On Windows, syscall.StartProcess and os/exec.Cmd did not properly
check for invalid environment variable values. A malicious
environment variable value could exploit this behavior to set a
value for a different environment variable. For example, the
environment variable string "A=B\x00C=D" set the variables "A=B" and
"C=D".
Thanks to RyotaK (https://twitter.com/ryotkak) for reporting this
issue.
This is CVE-2022-41716 and Go issue https://go.dev/issue/56284.
This Go release also fixes https://github.com/golang/go/issues/56309, a
runtime bug which can cause random memory corruption when a goroutine
exits with runtime.LockOSThread() set. This fix is necessary to unblock
work to replace certain uses of pkg/reexec with unshared OS threads.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This restores compatibility with go1.18, which was broken since commit;
c062238ea4
cmd.Environ() is new in go1.19, and not needed for this specific case.
Without this, trying to use this package in code that uses go1.18 will fail;
builder/remotecontext/git/gitutils.go:216:23: cmd.Environ undefined (type *exec.Cmd has no field or method Environ)
Changing to use `os.Environ()` instead restores compatibility with go1.18
Full diff: f9cb47a052...5aac513617
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This example was mounting `/dev/zero` as `/dev/nulo` inside the container.
The `nulo` name was intended to be a "made up / custom" name, but various
readers thought it to be a typo for `/dev/null`.
This patch updates the example to use `/dev/foobar` as name, which should
make it more clear that it's a custom name.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Commit 955c1f881a
(v17.12.0) replaced detection of support for multiple lowerdirs (as required by
overlay2) to not depend on the kernel version. The `overlay2.override_kernel_check`
was still used to print a warning that older kernel versions may not have full
support.
After this, e226aea280
(v20.10, but backported to v19.03.7) removed uses of the option altogether.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
> Security options with `:` as a separator are deprecated and will be completely unsupported in 17.04, use `=` instead.
Signed-off-by: Felix Geyer <debfx@fobos.de>
From the mailing list:
We have just released Go versions 1.19.2 and 1.18.7, minor point releases.
These minor releases include 3 security fixes following the security policy:
- archive/tar: unbounded memory consumption when reading headers
Reader.Read did not set a limit on the maximum size of file headers.
A maliciously crafted archive could cause Read to allocate unbounded
amounts of memory, potentially causing resource exhaustion or panics.
Reader.Read now limits the maximum size of header blocks to 1 MiB.
Thanks to Adam Korczynski (ADA Logics) and OSS-Fuzz for reporting this issue.
This is CVE-2022-2879 and Go issue https://go.dev/issue/54853.
- net/http/httputil: ReverseProxy should not forward unparseable query parameters
Requests forwarded by ReverseProxy included the raw query parameters from the
inbound request, including unparseable parameters rejected by net/http. This
could permit query parameter smuggling when a Go proxy forwards a parameter
with an unparseable value.
ReverseProxy will now sanitize the query parameters in the forwarded query
when the outbound request's Form field is set after the ReverseProxy.Director
function returns, indicating that the proxy has parsed the query parameters.
Proxies which do not parse query parameters continue to forward the original
query parameters unchanged.
Thanks to Gal Goldstein (Security Researcher, Oxeye) and
Daniel Abeles (Head of Research, Oxeye) for reporting this issue.
This is CVE-2022-2880 and Go issue https://go.dev/issue/54663.
- regexp/syntax: limit memory used by parsing regexps
The parsed regexp representation is linear in the size of the input,
but in some cases the constant factor can be as high as 40,000,
making relatively small regexps consume much larger amounts of memory.
Each regexp being parsed is now limited to a 256 MB memory footprint.
Regular expressions whose representation would use more space than that
are now rejected. Normal use of regular expressions is unaffected.
Thanks to Adam Korczynski (ADA Logics) and OSS-Fuzz for reporting this issue.
This is CVE-2022-41715 and Go issue https://go.dev/issue/55949.
View the release notes for more information: https://go.dev/doc/devel/release#go1.19.2
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
gofumpt provides a supserset of gofmt / go fmt, but not every developer may have
it installed, so for situations where it's not available, fall back to gofmt.
As our code has been formatted with gofumpt already, in most cases contributions
will follow those formatting rules, but in some cases there may be a difference,
which would already be flagged by manual code review, but let's also enable the
gofumpt linter.
With this change, `make fmt` will use gofumpt is available; gofumpt has been
added to the dev-container, so `make -f docker.Makefile fmt` will always use it.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Looks like the linter uses an explicit -lang, which (for go1.19)
results in some additional formatting for octal values.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
