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go: fix CVE-2023-24537 Infinite loop in parsing

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Setting a large line or column number using a //line directive can cause
integer overflow even in small source files.

Limit line and column numbers in //line directives to 2^30-1, which
is small enough to avoid int32 overflow on all reasonbly-sized files.

Fixes CVE-2023-24537
Fixes #59273
For #59180

(From OE-Core rev: 15c07dff384ce4fb0e90f4f32c182a82101a1c82)

Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Vivek Kumbhar
2023-04-21 08:20:12 +05:30
committed by Steve Sakoman
parent d19f7ddf5a
commit c34e0e1e0f
2 changed files with 76 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/go/go-1.17.13.inc
+1
View File
@@ -27,6 +27,7 @@ SRC_URI += "\
file://add_godebug.patch \
file://cve-2022-41725.patch \
file://CVE-2022-41722.patch \
file://CVE-2023-24537.patch \
"
SRC_URI[main.sha256sum] = "a1a48b23afb206f95e7bbaa9b898d965f90826f6f1d1fc0c1d784ada0cd300fd"
meta/recipes-devtools/go/go-1.18/CVE-2023-24537.patch
+75
View File
@@ -0,0 +1,75 @@
From bf8c7c575c8a552d9d79deb29e80854dc88528d0 Mon Sep 17 00:00:00 2001
From: Damien Neil <dneil@google.com>
Date: Mon, 20 Mar 2023 10:43:19 -0700
Subject: [PATCH] [release-branch.go1.20] mime/multipart: limit parsed mime
message sizes
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802456
Reviewed-by: Julie Qiu <julieqiu@google.com>
Reviewed-by: Roland Shoemaker <bracewell@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802611
Reviewed-by: Damien Neil <dneil@google.com>
Change-Id: Ifdfa192d54f722d781a4d8c5f35b5fb72d122168
Reviewed-on: https://go-review.googlesource.com/c/go/+/481986
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Upstream-Status: Backport [https://github.com/golang/go/commit/126a1d02da82f93ede7ce0bd8d3c51ef627f2104]
CVE: CVE-2023-24537
Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
---
src/go/parser/parser_test.go | 16 ++++++++++++++++
src/go/scanner/scanner.go | 5 ++++-
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/src/go/parser/parser_test.go b/src/go/parser/parser_test.go
index 1a46c87..993df63 100644
--- a/src/go/parser/parser_test.go
+++ b/src/go/parser/parser_test.go
@@ -746,3 +746,19 @@ func TestScopeDepthLimit(t *testing.T) {
}
}
}
+
+// TestIssue59180 tests that line number overflow doesn't cause an infinite loop.
+func TestIssue59180(t *testing.T) {
+ testcases := []string{
+ "package p\n//line :9223372036854775806\n\n//",
+ "package p\n//line :1:9223372036854775806\n\n//",
+ "package p\n//line file:9223372036854775806\n\n//",
+ }
+
+ for _, src := range testcases {
+ _, err := ParseFile(token.NewFileSet(), "", src, ParseComments)
+ if err == nil {
+ t.Errorf("ParseFile(%s) succeeded unexpectedly", src)
+ }
+ }
+}
diff --git a/src/go/scanner/scanner.go b/src/go/scanner/scanner.go
index f08e28c..ff847b5 100644
--- a/src/go/scanner/scanner.go
+++ b/src/go/scanner/scanner.go
@@ -251,13 +251,16 @@ func (s *Scanner) updateLineInfo(next, offs int, text []byte) {
return
}
+ // Put a cap on the maximum size of line and column numbers.
+ // 30 bits allows for some additional space before wrapping an int32.
+ const maxLineCol = 1<<30 - 1
var line, col int
i2, n2, ok2 := trailingDigits(text[:i-1])
if ok2 {
//line filename:line:col
i, i2 = i2, i
line, col = n2, n
- if col == 0 {
+ if col == 0 || col > maxLineCol {
s.error(offs+i2, "invalid column number: "+string(text[i2:]))
return
}
--
2.25.1