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avahi: fix CVE-2023-38469

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A vulnerability was found in Avahi, where a reachable assertion
exists in avahi_dns_packet_append_record.

(From OE-Core rev: 8bd1980fd4175be3dd68987f8c5653409b76f544)

Signed-off-by: Meenali Gupta <meenali.gupta@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Meenali Gupta
2023-11-16 10:38:42 +00:00
committed by Steve Sakoman
parent f2c0b5cef2
commit 973020ce12
2 changed files with 48 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
meta/recipes-connectivity/avahi/avahi_0.8.bb
View File

@@ -28,6 +28,7 @@ SRC_URI = "https://github.com/lathiat/avahi/releases/download/v${PV}/avahi-${PV}
file://local-ping.patch \
file://CVE-2023-38471.patch \
file://CVE-2023-38470.patch \
file://CVE-2023-38469.patch \
"
UPSTREAM_CHECK_URI = "https://github.com/lathiat/avahi/releases/"

47
meta/recipes-connectivity/avahi/files/CVE-2023-38469.patch Normal file
View File

@@ -0,0 +1,47 @@
From a337a1ba7d15853fb56deef1f464529af6e3a1cf Mon Sep 17 00:00:00 2001
From: Evgeny Vereshchagin <evvers@ya.ru>
Date: Mon, 23 Oct 2023 20:29:31 +0000
Subject: [PATCH]core: reject overly long TXT resource records
Closes https://github.com/lathiat/avahi/issues/455
Upstream-Status: Backport [https://github.com/lathiat/avahi/pull/500/commits/a337a1ba7d15853fb56deef1f464529af6e3a1cf]
CVE: CVE-2023-38469
Signed-off-by: Meenali Gupta <meenali.gupta@windriver.com>
---
avahi-core/rr.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/avahi-core/rr.c b/avahi-core/rr.c
index 7fa0bee..b03a24c 100644
--- a/avahi-core/rr.c
+++ b/avahi-core/rr.c
@@ -32,6 +32,7 @@
#include <avahi-common/malloc.h>
#include <avahi-common/defs.h>
+#include "dns.h"
#include "rr.h"
#include "log.h"
#include "util.h"
@@ -688,11 +689,17 @@ int avahi_record_is_valid(AvahiRecord *r) {
case AVAHI_DNS_TYPE_TXT: {
AvahiStringList *strlst;
+ size_t used = 0;
- for (strlst = r->data.txt.string_list; strlst; strlst = strlst->next)
+ for (strlst = r->data.txt.string_list; strlst; strlst = strlst->next) {
if (strlst->size > 255 || strlst->size <= 0)
return 0;
+ used += 1+strlst->size;
+ if (used > AVAHI_DNS_RDATA_MAX)
+ return 0;
+ }
+
return 1;
}
}
--
2.40.0