83 lines
2.8 KiB
Diff
83 lines
2.8 KiB
Diff
From a847d643594b5512e958daeb2fa26ec3199118b0 Mon Sep 17 00:00:00 2001
|
|
From: jikui <jikui2@huawei.com>
|
|
Date: Tue, 19 Apr 2022 14:36:11 +0800
|
|
Subject: [PATCH] busybox: fix CVE-2022-28391
|
|
|
|
backport from upstream:
|
|
https://git.alpinelinux.org/aports/plain/main/busybox/0001-libbb-sockaddr2str-ensure-only-printable-characters-.patch
|
|
https://git.alpinelinux.org/aports/plain/main/busybox/0002-nslookup-sanitize-all-printed-strings-with-printable.patch
|
|
|
|
Signed-off-by: jikui <jikui2@huawei.com>
|
|
---
|
|
libbb/xconnect.c | 5 +++--
|
|
networking/nslookup.c | 8 ++++----
|
|
2 files changed, 7 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/libbb/xconnect.c b/libbb/xconnect.c
|
|
index eb2871c..b5520bb 100644
|
|
--- a/libbb/xconnect.c
|
|
+++ b/libbb/xconnect.c
|
|
@@ -501,8 +501,9 @@ static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags)
|
|
);
|
|
if (rc)
|
|
return NULL;
|
|
+ /* ensure host contains only printable characters */
|
|
if (flags & IGNORE_PORT)
|
|
- return xstrdup(host);
|
|
+ return xstrdup(printable_string(host));
|
|
#if ENABLE_FEATURE_IPV6
|
|
if (sa->sa_family == AF_INET6) {
|
|
if (strchr(host, ':')) /* heh, it's not a resolved hostname */
|
|
@@ -513,7 +514,7 @@ static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags)
|
|
#endif
|
|
/* For now we don't support anything else, so it has to be INET */
|
|
/*if (sa->sa_family == AF_INET)*/
|
|
- return xasprintf("%s:%s", host, serv);
|
|
+ return xasprintf("%s:%s", printable_string(host), serv);
|
|
/*return xstrdup(host);*/
|
|
}
|
|
|
|
diff --git a/networking/nslookup.c b/networking/nslookup.c
|
|
index 24e09d4..89b9c8a 100644
|
|
--- a/networking/nslookup.c
|
|
+++ b/networking/nslookup.c
|
|
@@ -404,7 +404,7 @@ static int parse_reply(const unsigned char *msg, size_t len)
|
|
//printf("Unable to uncompress domain: %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
- printf(format, ns_rr_name(rr), dname);
|
|
+ printf(format, ns_rr_name(rr), printable_string(dname));
|
|
break;
|
|
|
|
case ns_t_mx:
|
|
@@ -419,7 +419,7 @@ static int parse_reply(const unsigned char *msg, size_t len)
|
|
//printf("Cannot uncompress MX domain: %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
- printf("%s\tmail exchanger = %d %s\n", ns_rr_name(rr), n, dname);
|
|
+ printf("%s\tmail exchanger = %d %s\n", ns_rr_name(rr), n, printable_string(dname));
|
|
break;
|
|
|
|
case ns_t_txt:
|
|
@@ -431,7 +431,7 @@ static int parse_reply(const unsigned char *msg, size_t len)
|
|
if (n > 0) {
|
|
memset(dname, 0, sizeof(dname));
|
|
memcpy(dname, ns_rr_rdata(rr) + 1, n);
|
|
- printf("%s\ttext = \"%s\"\n", ns_rr_name(rr), dname);
|
|
+ printf("%s\ttext = \"%s\"\n", ns_rr_name(rr), printable_string(dname));
|
|
}
|
|
break;
|
|
|
|
@@ -461,7 +461,7 @@ static int parse_reply(const unsigned char *msg, size_t len)
|
|
return -1;
|
|
}
|
|
|
|
- printf("\tmail addr = %s\n", dname);
|
|
+ printf("\tmail addr = %s\n", printable_string(dname));
|
|
cp += n;
|
|
|
|
printf("\tserial = %lu\n", ns_get32(cp));
|
|
--
|
|
2.17.1
|
|
|