golang: CVE-2022-32189 a denial of service

Source: https://github.com/golang/go
MR: 120634
Type: Security Fix
Disposition: Backport from https://github.com/golang/go/commit/703c8ab7e5ba75c95553d4e249309297abad7102
ChangeID: 3ade323dd52a6b654358f6738a0b3411ccc6d3f8
Description:
	CVE-2022-32189 golang: math/big: decoding big.Float and big.Rat types can panic if the encoded message is too short, potentially allowing a denial of service.

(From OE-Core rev: 9b3420c9a91059eb55754078bb1e733972e94489)

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/go/go-1.14.inc

@@ -31,6 +31,7 @@ SRC_URI += "\
     file://CVE-2022-30633.patch \
     file://CVE-2022-30635.patch \
     file://CVE-2022-32148.patch \
+    file://CVE-2022-32189.patch \
 "
 
 SRC_URI_append_libc-musl = " file://0009-ld-replace-glibc-dynamic-linker-with-musl.patch"

meta/recipes-devtools/go/go-1.14/CVE-2022-32189.patch

@@ -0,0 +1,113 @@
+From 027e7e1578d3d7614f7586eff3894b83d9709e14 Mon Sep 17 00:00:00 2001
+From: Hitendra Prajapati <hprajapati@mvista.com>
+Date: Mon, 29 Aug 2022 10:08:34 +0530
+Subject: [PATCH] CVE-2022-32189
+
+Upstream-Status: Backport [https://github.com/golang/go/commit/703c8ab7e5ba75c95553d4e249309297abad7102]
+CVE: CVE-2022-32189
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ src/math/big/floatmarsh.go      |  7 +++++++
+ src/math/big/floatmarsh_test.go | 12 ++++++++++++
+ src/math/big/ratmarsh.go        |  6 ++++++
+ src/math/big/ratmarsh_test.go   | 12 ++++++++++++
+ 4 files changed, 37 insertions(+)
+
+diff --git a/src/math/big/floatmarsh.go b/src/math/big/floatmarsh.go
+index d1c1dab..990e085 100644
+--- a/src/math/big/floatmarsh.go
++++ b/src/math/big/floatmarsh.go
+@@ -8,6 +8,7 @@ package big
+ 
+ import (
+ 	"encoding/binary"
++	"errors"
+ 	"fmt"
+ )
+ 
+@@ -67,6 +68,9 @@ func (z *Float) GobDecode(buf []byte) error {
+ 		*z = Float{}
+ 		return nil
+ 	}
++	if len(buf) < 6 {
++		return errors.New("Float.GobDecode: buffer too small")
++	}
+ 
+ 	if buf[0] != floatGobVersion {
+ 		return fmt.Errorf("Float.GobDecode: encoding version %d not supported", buf[0])
+@@ -83,6 +87,9 @@ func (z *Float) GobDecode(buf []byte) error {
+ 	z.prec = binary.BigEndian.Uint32(buf[2:])
+ 
+ 	if z.form == finite {
++		if len(buf) < 10 {
++			return errors.New("Float.GobDecode: buffer too small for finite form float")
++		}
+ 		z.exp = int32(binary.BigEndian.Uint32(buf[6:]))
+ 		z.mant = z.mant.setBytes(buf[10:])
+ 	}
+diff --git a/src/math/big/floatmarsh_test.go b/src/math/big/floatmarsh_test.go
+index c056d78..401f45a 100644
+--- a/src/math/big/floatmarsh_test.go
++++ b/src/math/big/floatmarsh_test.go
+@@ -137,3 +137,15 @@ func TestFloatJSONEncoding(t *testing.T) {
+ 		}
+ 	}
+ }
++
++func TestFloatGobDecodeShortBuffer(t *testing.T) {
++	for _, tc := range [][]byte{
++		[]byte{0x1, 0x0, 0x0, 0x0},
++		[]byte{0x1, 0xfa, 0x0, 0x0, 0x0, 0x0},
++	} {
++		err := NewFloat(0).GobDecode(tc)
++		if err == nil {
++			t.Error("expected GobDecode to return error for malformed input")
++		}
++	}
++}
+diff --git a/src/math/big/ratmarsh.go b/src/math/big/ratmarsh.go
+index fbc7b60..56102e8 100644
+--- a/src/math/big/ratmarsh.go
++++ b/src/math/big/ratmarsh.go
+@@ -45,12 +45,18 @@ func (z *Rat) GobDecode(buf []byte) error {
+ 		*z = Rat{}
+ 		return nil
+ 	}
++	if len(buf) < 5 {
++		return errors.New("Rat.GobDecode: buffer too small")
++	}
+ 	b := buf[0]
+ 	if b>>1 != ratGobVersion {
+ 		return fmt.Errorf("Rat.GobDecode: encoding version %d not supported", b>>1)
+ 	}
+ 	const j = 1 + 4
+ 	i := j + binary.BigEndian.Uint32(buf[j-4:j])
++	if len(buf) < int(i) {
++		return errors.New("Rat.GobDecode: buffer too small")
++	}
+ 	z.a.neg = b&1 != 0
+ 	z.a.abs = z.a.abs.setBytes(buf[j:i])
+ 	z.b.abs = z.b.abs.setBytes(buf[i:])
+diff --git a/src/math/big/ratmarsh_test.go b/src/math/big/ratmarsh_test.go
+index 351d109..55a9878 100644
+--- a/src/math/big/ratmarsh_test.go
++++ b/src/math/big/ratmarsh_test.go
+@@ -123,3 +123,15 @@ func TestRatXMLEncoding(t *testing.T) {
+ 		}
+ 	}
+ }
++
++func TestRatGobDecodeShortBuffer(t *testing.T) {
++	for _, tc := range [][]byte{
++		[]byte{0x2},
++		[]byte{0x2, 0x0, 0x0, 0x0, 0xff},
++	} {
++		err := NewRat(1, 2).GobDecode(tc)
++		if err == nil {
++			t.Error("expected GobDecode to return error for malformed input")
++		}
++	}
++}
+-- 
+2.25.1
+