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| author | Roland Shoemaker <bracewell@google.com> | 2023-05-05 13:10:34 -0700 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2023-06-06 17:03:00 +0000 |
| commit | 356a419e2f811b65d227abcea1a346f8dcb154e0 (patch) | |
| tree | 09b56a1821261613f0d18f4f7508ef623c32f3b9 | |
| parent | fa60c381ed06c12f9c27a7b50ca44c5f84f7f0f4 (diff) | |
| download | go-356a419e2f811b65d227abcea1a346f8dcb154e0.tar.gz go-356a419e2f811b65d227abcea1a346f8dcb154e0.zip | |
[release-branch.go1.20] cmd/go: enforce flags with non-optional arguments
Enforce that linker flags which expect arguments get them, otherwise it
may be possible to smuggle unexpected flags through as the linker can
consume what looks like a flag as an argument to a preceding flag (i.e.
"-Wl,-O -Wl,-R,-bad-flag" is interpreted as "-O=-R -bad-flag"). Also be
somewhat more restrictive in the general format of some flags.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
Updates #60305
Fixes #60512
Fixes CVE-2023-29404
Change-Id: I5989f68d21a8851d8edd47f08550850524ee9180
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1876275
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
(cherry picked from commit 896779503cf754cbdac24b61d4cc953b50fe2dde)
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1902226
TryBot-Result: Security TryBots <security-trybots@go-security-trybots.iam.gserviceaccount.com>
Run-TryBot: Roland Shoemaker <bracewell@google.com>
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1904346
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/501221
Run-TryBot: David Chase <drchase@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
| -rw-r--r-- | src/cmd/go/internal/work/security.go | 6 | ||||
| -rw-r--r-- | src/cmd/go/internal/work/security_test.go | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/src/cmd/go/internal/work/security.go b/src/cmd/go/internal/work/security.go index f4f1880c84..270a34e9c7 100644 --- a/src/cmd/go/internal/work/security.go +++ b/src/cmd/go/internal/work/security.go @@ -180,10 +180,10 @@ var validLinkerFlags = []*lazyregexp.Regexp{ re(`-Wl,-berok`), re(`-Wl,-Bstatic`), re(`-Wl,-Bsymbolic-functions`), - re(`-Wl,-O([^@,\-][^,]*)?`), + re(`-Wl,-O[0-9]+`), re(`-Wl,-d[ny]`), re(`-Wl,--disable-new-dtags`), - re(`-Wl,-e[=,][a-zA-Z0-9]*`), + re(`-Wl,-e[=,][a-zA-Z0-9]+`), re(`-Wl,--enable-new-dtags`), re(`-Wl,--end-group`), re(`-Wl,--(no-)?export-dynamic`), @@ -192,7 +192,7 @@ var validLinkerFlags = []*lazyregexp.Regexp{ re(`-Wl,--hash-style=(sysv|gnu|both)`), re(`-Wl,-headerpad_max_install_names`), re(`-Wl,--no-undefined`), - re(`-Wl,-R([^@\-][^,@]*$)`), + re(`-Wl,-R,?([^@\-,][^,@]*$)`), re(`-Wl,--just-symbols[=,]([^,@\-][^,@]+)`), re(`-Wl,-rpath(-link)?[=,]([^,@\-][^,]+)`), re(`-Wl,-s`), diff --git a/src/cmd/go/internal/work/security_test.go b/src/cmd/go/internal/work/security_test.go index 8cecc74eae..c05ba7b9a4 100644 --- a/src/cmd/go/internal/work/security_test.go +++ b/src/cmd/go/internal/work/security_test.go @@ -230,6 +230,11 @@ var badLinkerFlags = [][]string{ {"-Wl,-R,@foo"}, {"-Wl,--just-symbols,@foo"}, {"../x.o"}, + {"-Wl,-R,"}, + {"-Wl,-O"}, + {"-Wl,-e="}, + {"-Wl,-e,"}, + {"-Wl,-R,-flag"}, } func TestCheckLinkerFlags(t *testing.T) { |