111 строки
3.7 KiB
Diff
111 строки
3.7 KiB
Diff
From 0c8da1bead8ffaf270b4b723ead2c517371405d7 Mon Sep 17 00:00:00 2001
|
|
From: Ariadne Conill <ariadne@dereferenced.org>
|
|
Date: Sun, 3 Apr 2022 12:14:33 +0000
|
|
Subject: [PATCH 1/2] libbb: sockaddr2str: ensure only printable characters are
|
|
returned for the hostname part
|
|
|
|
CVE: Pending
|
|
Upstream-Status: Pending
|
|
Signed-off-by: Ariadne Conill <ariadne@dereferenced.org>
|
|
Signed-off-by: Henry Beberman <henry.beberman@microsoft.com>
|
|
---
|
|
libbb/xconnect.c | 5 +++--
|
|
1 file changed, 3 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/libbb/xconnect.c b/libbb/xconnect.c
|
|
index 0e0b247b8..02c061e67 100644
|
|
--- a/libbb/xconnect.c
|
|
+++ b/libbb/xconnect.c
|
|
@@ -497,8 +497,9 @@ 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 */
|
|
@@ -509,7 +510,7 @@ 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);*/
|
|
}
|
|
|
|
--
|
|
2.35.1
|
|
|
|
From 812b407e545b70b16cf32aade135b5c32eaf674f Mon Sep 17 00:00:00 2001
|
|
From: Ariadne Conill <ariadne@dereferenced.org>
|
|
Date: Sun, 3 Apr 2022 12:16:45 +0000
|
|
Subject: [PATCH 2/2] nslookup: sanitize all printed strings with
|
|
printable_string
|
|
|
|
Otherwise, terminal sequences can be injected, which enables various terminal injection
|
|
attacks from DNS results.
|
|
|
|
CVE: Pending
|
|
Upstream-Status: Pending
|
|
Signed-off-by: Ariadne Conill <ariadne@dereferenced.org>
|
|
Signed-off-by: Henry Beberman <henry.beberman@microsoft.com>
|
|
---
|
|
networking/nslookup.c | 10 +++++-----
|
|
1 file changed, 5 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/networking/nslookup.c b/networking/nslookup.c
|
|
index 6da97baf4..4bdcde1b8 100644
|
|
--- a/networking/nslookup.c
|
|
+++ b/networking/nslookup.c
|
|
@@ -407,7 +407,7 @@ static NOINLINE 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:
|
|
@@ -422,7 +422,7 @@ static NOINLINE 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:
|
|
@@ -434,7 +434,7 @@ static NOINLINE 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;
|
|
|
|
@@ -454,7 +454,7 @@ static NOINLINE int parse_reply(const unsigned char *msg, size_t len)
|
|
}
|
|
|
|
printf("%s\tservice = %u %u %u %s\n", ns_rr_name(rr),
|
|
- ns_get16(cp), ns_get16(cp + 2), ns_get16(cp + 4), dname);
|
|
+ ns_get16(cp), ns_get16(cp + 2), ns_get16(cp + 4), printable_string(dname));
|
|
break;
|
|
|
|
case ns_t_soa:
|
|
@@ -483,7 +483,7 @@ static NOINLINE 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));
|
|
--
|
|
2.35.1
|
|
|