1 files changed, 66 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/dhcp/dhcp/CVE-2021-25217.patch b/meta/recipes-connectivity/dhcp/dhcp/CVE-2021-25217.patch
new file mode 100644
index 0000000000..91aaf83a77
--- /dev/null
+++ b/meta/recipes-connectivity/dhcp/dhcp/CVE-2021-25217.patch
@@ -0,0 +1,66 @@
+From 5a7344b05081d84343a1627e47478f3990b17700 Mon Sep 17 00:00:00 2001
+From: Minjae Kim <flowergom@gmail.com>
+Date: Thu, 8 Jul 2021 00:08:25 +0000
+Subject: [PATCH] ISC has disclosed a vulnerability in ISC DHCP
+ (CVE-2021-25217)
+
+On May 26, 2021, we (Internet Systems Consortium) disclosed a
+vulnerability affecting our ISC DHCP software:
+
+    CVE-2021-25217: A buffer overrun in lease file parsing code can be
+    used to exploit a common vulnerability shared by dhcpd and dhclient
+    https://kb.isc.org/docs/cve-2021-25217
+
+New versions of ISC DHCP are available from https://www.isc.org/downloads
+
+Operators and package maintainers who prefer to apply patches selectively can
+find individual vulnerability-specific patches in the "patches" subdirectory
+of the release directories for our two stable release branches (4.4 and 4.1-ESV)
+
+   https://downloads.isc.org/isc/dhcp/4.4.2-P1/patches
+   https://downloads.isc.org/isc/dhcp/4.1-ESV-R16-P1/patches
+
+With the public announcement of this vulnerability, the embargo
+period is ended and any updated software packages that have been
+prepared may be released.
+
+Upstream-Status: Accepted [https://www.openwall.com/lists/oss-security/2021/05/26/6]
+CVE: CVE-2021-25217
+Signed-off-by: Minjae Kim <flowergom@gmail.com>
+---
+ common/parse.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/common/parse.c b/common/parse.c
+index 386a632..fc7b39c 100644
+--- a/common/parse.c
++++ b/common/parse.c
+@@ -3,7 +3,7 @@
+    Common parser code for dhcpd and dhclient. */
+ 
+ /*
+- * Copyright (c) 2004-2019 by Internet Systems Consortium, Inc. ("ISC")
++ * Copyright (c) 2004-2021 by Internet Systems Consortium, Inc. ("ISC")
+  * Copyright (c) 1995-2003 by Internet Software Consortium
+  *
+  * This Source Code Form is subject to the terms of the Mozilla Public
+@@ -5556,13 +5556,14 @@ int parse_X (cfile, buf, max)
+                                skip_to_semi (cfile);
+                                return 0;
+                        }
+-                       convert_num (cfile, &buf [len], val, 16, 8);
+-                       if (len++ > max) {
++                       if (len >= max) {
+                                parse_warn (cfile,
+                                            "hexadecimal constant too long.");
+                                skip_to_semi (cfile);
+                                return 0;
+                        }
++                       convert_num (cfile, &buf [len], val, 16, 8);
++                       len++;
+                        token = peek_token (&val, (unsigned *)0, cfile);
+                        if (token == COLON)
+                                token = next_token (&val,
+-- 
+2.17.1
+