dnsmasq: bump to version 2.79
Drop upstream patches. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
parent
83867e47f2
commit
c8dec6271a
|
@ -1,212 +0,0 @@
|
|||
From 4fe6744a220eddd3f1749b40cac3dfc510787de6 Mon Sep 17 00:00:00 2001
|
||||
From: Simon Kelley <simon@thekelleys.org.uk>
|
||||
Date: Fri, 19 Jan 2018 12:26:08 +0000
|
||||
Subject: [PATCH] DNSSEC fix for wildcard NSEC records. CVE-2017-15107 applies.
|
||||
|
||||
It's OK for NSEC records to be expanded from wildcards,
|
||||
but in that case, the proof of non-existence is only valid
|
||||
starting at the wildcard name, *.<domain> NOT the name expanded
|
||||
from the wildcard. Without this check it's possible for an
|
||||
attacker to craft an NSEC which wrongly proves non-existence
|
||||
in a domain which includes a wildcard for NSEC.
|
||||
|
||||
[baruch: drop the CHANGELOG hunk]
|
||||
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
|
||||
---
|
||||
Upstream status: upstream commit 4fe6744a220e
|
||||
|
||||
CHANGELOG | 12 +++++-
|
||||
src/dnssec.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++-------
|
||||
2 files changed, 114 insertions(+), 15 deletions(-)
|
||||
|
||||
diff --git a/src/dnssec.c b/src/dnssec.c
|
||||
index eb6c11cbe00f..a54a0b4f14cf 100644
|
||||
--- a/src/dnssec.c
|
||||
+++ b/src/dnssec.c
|
||||
@@ -103,15 +103,17 @@ static void from_wire(char *name)
|
||||
static int count_labels(char *name)
|
||||
{
|
||||
int i;
|
||||
-
|
||||
+ char *p;
|
||||
+
|
||||
if (*name == 0)
|
||||
return 0;
|
||||
|
||||
- for (i = 0; *name; name++)
|
||||
- if (*name == '.')
|
||||
+ for (p = name, i = 0; *p; p++)
|
||||
+ if (*p == '.')
|
||||
i++;
|
||||
|
||||
- return i+1;
|
||||
+ /* Don't count empty first label. */
|
||||
+ return *name == '.' ? i : i+1;
|
||||
}
|
||||
|
||||
/* Implement RFC1982 wrapped compare for 32-bit numbers */
|
||||
@@ -1094,8 +1096,8 @@ static int hostname_cmp(const char *a, const char *b)
|
||||
}
|
||||
}
|
||||
|
||||
-static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsigned char **nsecs, int nsec_count,
|
||||
- char *workspace1, char *workspace2, char *name, int type, int *nons)
|
||||
+static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsigned char **nsecs, unsigned char **labels, int nsec_count,
|
||||
+ char *workspace1_in, char *workspace2, char *name, int type, int *nons)
|
||||
{
|
||||
int i, rc, rdlen;
|
||||
unsigned char *p, *psave;
|
||||
@@ -1108,6 +1110,9 @@ static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsi
|
||||
/* Find NSEC record that proves name doesn't exist */
|
||||
for (i = 0; i < nsec_count; i++)
|
||||
{
|
||||
+ char *workspace1 = workspace1_in;
|
||||
+ int sig_labels, name_labels;
|
||||
+
|
||||
p = nsecs[i];
|
||||
if (!extract_name(header, plen, &p, workspace1, 1, 10))
|
||||
return 0;
|
||||
@@ -1116,7 +1121,27 @@ static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsi
|
||||
psave = p;
|
||||
if (!extract_name(header, plen, &p, workspace2, 1, 10))
|
||||
return 0;
|
||||
-
|
||||
+
|
||||
+ /* If NSEC comes from wildcard expansion, use original wildcard
|
||||
+ as name for computation. */
|
||||
+ sig_labels = *labels[i];
|
||||
+ name_labels = count_labels(workspace1);
|
||||
+
|
||||
+ if (sig_labels < name_labels)
|
||||
+ {
|
||||
+ int k;
|
||||
+ for (k = name_labels - sig_labels; k != 0; k--)
|
||||
+ {
|
||||
+ while (*workspace1 != '.' && *workspace1 != 0)
|
||||
+ workspace1++;
|
||||
+ if (k != 1 && *workspace1 == '.')
|
||||
+ workspace1++;
|
||||
+ }
|
||||
+
|
||||
+ workspace1--;
|
||||
+ *workspace1 = '*';
|
||||
+ }
|
||||
+
|
||||
rc = hostname_cmp(workspace1, name);
|
||||
|
||||
if (rc == 0)
|
||||
@@ -1514,24 +1539,26 @@ static int prove_non_existence_nsec3(struct dns_header *header, size_t plen, uns
|
||||
|
||||
static int prove_non_existence(struct dns_header *header, size_t plen, char *keyname, char *name, int qtype, int qclass, char *wildname, int *nons)
|
||||
{
|
||||
- static unsigned char **nsecset = NULL;
|
||||
- static int nsecset_sz = 0;
|
||||
+ static unsigned char **nsecset = NULL, **rrsig_labels = NULL;
|
||||
+ static int nsecset_sz = 0, rrsig_labels_sz = 0;
|
||||
|
||||
int type_found = 0;
|
||||
- unsigned char *p = skip_questions(header, plen);
|
||||
+ unsigned char *auth_start, *p = skip_questions(header, plen);
|
||||
int type, class, rdlen, i, nsecs_found;
|
||||
|
||||
/* Move to NS section */
|
||||
if (!p || !(p = skip_section(p, ntohs(header->ancount), header, plen)))
|
||||
return 0;
|
||||
+
|
||||
+ auth_start = p;
|
||||
|
||||
for (nsecs_found = 0, i = ntohs(header->nscount); i != 0; i--)
|
||||
{
|
||||
unsigned char *pstart = p;
|
||||
|
||||
- if (!(p = skip_name(p, header, plen, 10)))
|
||||
+ if (!extract_name(header, plen, &p, daemon->workspacename, 1, 10))
|
||||
return 0;
|
||||
-
|
||||
+
|
||||
GETSHORT(type, p);
|
||||
GETSHORT(class, p);
|
||||
p += 4; /* TTL */
|
||||
@@ -1548,7 +1575,69 @@ static int prove_non_existence(struct dns_header *header, size_t plen, char *key
|
||||
if (!expand_workspace(&nsecset, &nsecset_sz, nsecs_found))
|
||||
return 0;
|
||||
|
||||
- nsecset[nsecs_found++] = pstart;
|
||||
+ if (type == T_NSEC)
|
||||
+ {
|
||||
+ /* If we're looking for NSECs, find the corresponding SIGs, to
|
||||
+ extract the labels value, which we need in case the NSECs
|
||||
+ are the result of wildcard expansion.
|
||||
+ Note that the NSEC may not have been validated yet
|
||||
+ so if there are multiple SIGs, make sure the label value
|
||||
+ is the same in all, to avoid be duped by a rogue one.
|
||||
+ If there are no SIGs, that's an error */
|
||||
+ unsigned char *p1 = auth_start;
|
||||
+ int res, j, rdlen1, type1, class1;
|
||||
+
|
||||
+ if (!expand_workspace(&rrsig_labels, &rrsig_labels_sz, nsecs_found))
|
||||
+ return 0;
|
||||
+
|
||||
+ rrsig_labels[nsecs_found] = NULL;
|
||||
+
|
||||
+ for (j = ntohs(header->nscount); j != 0; j--)
|
||||
+ {
|
||||
+ if (!(res = extract_name(header, plen, &p1, daemon->workspacename, 0, 10)))
|
||||
+ return 0;
|
||||
+
|
||||
+ GETSHORT(type1, p1);
|
||||
+ GETSHORT(class1, p1);
|
||||
+ p1 += 4; /* TTL */
|
||||
+ GETSHORT(rdlen1, p1);
|
||||
+
|
||||
+ if (!CHECK_LEN(header, p1, plen, rdlen1))
|
||||
+ return 0;
|
||||
+
|
||||
+ if (res == 1 && class1 == qclass && type1 == T_RRSIG)
|
||||
+ {
|
||||
+ int type_covered;
|
||||
+ unsigned char *psav = p1;
|
||||
+
|
||||
+ if (rdlen < 18)
|
||||
+ return 0; /* bad packet */
|
||||
+
|
||||
+ GETSHORT(type_covered, p1);
|
||||
+
|
||||
+ if (type_covered == T_NSEC)
|
||||
+ {
|
||||
+ p1++; /* algo */
|
||||
+
|
||||
+ /* labels field must be the same in every SIG we find. */
|
||||
+ if (!rrsig_labels[nsecs_found])
|
||||
+ rrsig_labels[nsecs_found] = p1;
|
||||
+ else if (*rrsig_labels[nsecs_found] != *p1) /* algo */
|
||||
+ return 0;
|
||||
+ }
|
||||
+ p1 = psav;
|
||||
+ }
|
||||
+
|
||||
+ if (!ADD_RDLEN(header, p1, plen, rdlen1))
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ /* Must have found at least one sig. */
|
||||
+ if (!rrsig_labels[nsecs_found])
|
||||
+ return 0;
|
||||
+ }
|
||||
+
|
||||
+ nsecset[nsecs_found++] = pstart;
|
||||
}
|
||||
|
||||
if (!ADD_RDLEN(header, p, plen, rdlen))
|
||||
@@ -1556,7 +1645,7 @@ static int prove_non_existence(struct dns_header *header, size_t plen, char *key
|
||||
}
|
||||
|
||||
if (type_found == T_NSEC)
|
||||
- return prove_non_existence_nsec(header, plen, nsecset, nsecs_found, daemon->workspacename, keyname, name, qtype, nons);
|
||||
+ return prove_non_existence_nsec(header, plen, nsecset, rrsig_labels, nsecs_found, daemon->workspacename, keyname, name, qtype, nons);
|
||||
else if (type_found == T_NSEC3)
|
||||
return prove_non_existence_nsec3(header, plen, nsecset, nsecs_found, daemon->workspacename, keyname, name, qtype, wildname, nons);
|
||||
else
|
||||
--
|
||||
2.15.1
|
||||
|
|
@ -1,29 +0,0 @@
|
|||
From cd7df612b14ec1bf831a966ccaf076be0dae7404 Mon Sep 17 00:00:00 2001
|
||||
From: Simon Kelley <simon@thekelleys.org.uk>
|
||||
Date: Sat, 20 Jan 2018 00:10:55 +0000
|
||||
Subject: [PATCH] Fix DNSSEC validation errors introduced in
|
||||
4fe6744a220eddd3f1749b40cac3dfc510787de6
|
||||
|
||||
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
|
||||
---
|
||||
Upstream status: upstream commit cd7df612b14ec
|
||||
|
||||
src/dnssec.c | 2 +-
|
||||
1 file changed, 1 insertion(+), 1 deletion(-)
|
||||
|
||||
diff --git a/src/dnssec.c b/src/dnssec.c
|
||||
index a54a0b4f14cf..c47e33569f96 100644
|
||||
--- a/src/dnssec.c
|
||||
+++ b/src/dnssec.c
|
||||
@@ -1610,7 +1610,7 @@ static int prove_non_existence(struct dns_header *header, size_t plen, char *key
|
||||
int type_covered;
|
||||
unsigned char *psav = p1;
|
||||
|
||||
- if (rdlen < 18)
|
||||
+ if (rdlen1 < 18)
|
||||
return 0; /* bad packet */
|
||||
|
||||
GETSHORT(type_covered, p1);
|
||||
--
|
||||
2.15.1
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
# Locally calculated after checking pgp signature
|
||||
# http://www.thekelleys.org.uk/dnsmasq/dnsmasq-2.78.tar.xz.asc
|
||||
sha256 89949f438c74b0c7543f06689c319484bd126cc4b1f8c745c742ab397681252b dnsmasq-2.78.tar.xz
|
||||
# http://www.thekelleys.org.uk/dnsmasq/dnsmasq-2.79.tar.xz.asc
|
||||
sha256 78ad74f5ca14fd85a8bac93f764cd9d60b27579e90eabd3687ca7b030e67861f dnsmasq-2.79.tar.xz
|
||||
# Locally calculated
|
||||
sha256 dcc100d4161cc0b7177545ab6e47216f84857cda3843847c792a25289852dcaa COPYING
|
||||
sha256 8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903 COPYING-v3
|
||||
|
|
|
@ -4,7 +4,7 @@
|
|||
#
|
||||
################################################################################
|
||||
|
||||
DNSMASQ_VERSION = 2.78
|
||||
DNSMASQ_VERSION = 2.79
|
||||
DNSMASQ_SOURCE = dnsmasq-$(DNSMASQ_VERSION).tar.xz
|
||||
DNSMASQ_SITE = http://thekelleys.org.uk/dnsmasq
|
||||
DNSMASQ_MAKE_ENV = $(TARGET_MAKE_ENV) CC="$(TARGET_CC)"
|
||||
|
|
Loading…
Reference in a new issue