openRuyi-tutorials/build-linux-system-from-scratch
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Step1: build with busybox.

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Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>
This commit is contained in:
Chen Wang
2025-11-24 16:22:33 +08:00
committed by Chen Wang
commit d35682f2b7
163 changed files with 15660 additions and 0 deletions
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69
package/busybox/0004-nslookup-sanitize-all-printed-strings-with-printable.patch Normal file
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@@ -0,0 +1,69 @@
From 56b84c6efb9a06ae294eb92cf9634f70af443b0a Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Mon, 19 Sep 2022 14:15:12 +0200
Subject: [PATCH] nslookup: sanitize all printed strings with printable_string
Otherwise, terminal sequences can be injected, which enables various terminal injection
attacks from DNS results.
CVE: CVE-2022-28391
Signed-off-by: Ariadne Conill <ariadne@dereferenced.org>
Tested-by: Radoslav Kolev <radoslav.kolev@suse.com>
Backport from ML: http://lists.busybox.net/pipermail/busybox/2022-July/089795.html
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
---
networking/nslookup.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/networking/nslookup.c b/networking/nslookup.c
index b67d354f7..79412477c 100644
--- a/networking/nslookup.c
+++ b/networking/nslookup.c
@@ -784,7 +784,7 @@ 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:
@@ -799,7 +799,7 @@ 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:
@@ -811,7 +811,7 @@ 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;
@@ -831,7 +831,7 @@ 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:
@@ -860,7 +860,7 @@ 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));
--
2.48.1