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systemd: Security fix CVE-2018-16866

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Affects < v240

(From OE-Core rev: bdee9122fe67467d1ec17012902a441fecb0cb9b)

(From OE-Core rev: 5e4d9fd5b13dd0603d9001b478b0c3170dd81004)

Signed-off-by: Marcus Cooper <marcusc@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Marcus Cooper
2019-01-24 13:43:41 +01:00
committed by Richard Purdie
parent dc09249022
commit d5845c8bc1
3 changed files with 163 additions and 0 deletions
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77
meta/recipes-core/systemd/systemd/0027-journal-fix-syslog_parse_identifier.patch Normal file
View File

@@ -0,0 +1,77 @@
From 8ccebb04e07628f7fe10131d6cd4f19d6a0d8f45 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 8 Aug 2018 15:06:36 +0900
Subject: [PATCH] journal: fix syslog_parse_identifier()
Fixes #9829.
An out of bounds read was discovered in systemd-journald in the way it
parses log messages that terminate with a colon ':'. A local attacker
can use this flaw to disclose process memory data.
Patch backported from systemd master at
a6aadf4ae0bae185dc4c414d492a4a781c80ffe5.
This matches the change done for systemd-journald, hence forming the first
part of the fix for CVE-2018-16866.
---
src/journal/journald-syslog.c | 6 +++---
src/journal/test-journal-syslog.c | 10 ++++++++--
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c
index 9dea116722..97711ac7a3 100644
--- a/src/journal/journald-syslog.c
+++ b/src/journal/journald-syslog.c
@@ -194,7 +194,7 @@ size_t syslog_parse_identifier(const char **buf, char **identifier, char **pid)
e = l;
l--;
- if (p[l-1] == ']') {
+ if (l > 0 && p[l-1] == ']') {
size_t k = l-1;
for (;;) {
@@ -219,8 +219,8 @@ size_t syslog_parse_identifier(const char **buf, char **identifier, char **pid)
if (t)
*identifier = t;
- if (strchr(WHITESPACE, p[e]))
- e++;
+ e += strspn(p + e, WHITESPACE);
+
*buf = p + e;
return e;
}
diff --git a/src/journal/test-journal-syslog.c b/src/journal/test-journal-syslog.c
index 9ba86f6c8a..05f759817e 100644
--- a/src/journal/test-journal-syslog.c
+++ b/src/journal/test-journal-syslog.c
@@ -5,8 +5,8 @@
#include "macro.h"
#include "string-util.h"
-static void test_syslog_parse_identifier(const char* str,
- const char *ident, const char*pid, int ret) {
+static void test_syslog_parse_identifier(const char *str,
+ const char *ident, const char *pid, int ret) {
const char *buf = str;
_cleanup_free_ char *ident2 = NULL, *pid2 = NULL;
int ret2;
@@ -21,7 +21,13 @@ static void test_syslog_parse_identifier(const char* str,
int main(void) {
test_syslog_parse_identifier("pidu[111]: xxx", "pidu", "111", 11);
test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, 6);
+ test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, 7);
test_syslog_parse_identifier("pidu xxx", NULL, NULL, 0);
+ test_syslog_parse_identifier(":", "", NULL, 1);
+ test_syslog_parse_identifier(": ", "", NULL, 3);
+ test_syslog_parse_identifier("pidu:", "pidu", NULL, 5);
+ test_syslog_parse_identifier("pidu: ", "pidu", NULL, 6);
+ test_syslog_parse_identifier("pidu : ", NULL, NULL, 0);
return 0;
}
--
2.11.0

84
meta/recipes-core/systemd/systemd/0028-journal-do-not-remove-multiple-spaces-after-identifi.patch Normal file
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@@ -0,0 +1,84 @@
From c3a7da1bbb6d2df8ab7ea1c7ce34ded37a21959f Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 10 Aug 2018 11:07:54 +0900
Subject: [PATCH] journal: do not remove multiple spaces after identifier in
syslog message
Single space is used as separator.
C.f. discussions in #156.
Fixes #9839 introduced by a6aadf4ae0bae185dc4c414d492a4a781c80ffe5.
Patch backported from systemd master at
8595102d3ddde6d25c282f965573a6de34ab4421.
This matches the change done for systemd-journald, hence forming the second
part of the fix for CVE-2018-16866
---
src/journal/journald-syslog.c | 4 +++-
src/journal/test-journal-syslog.c | 24 ++++++++++++++----------
2 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c
index 97711ac7a3..e0b55cc566 100644
--- a/src/journal/journald-syslog.c
+++ b/src/journal/journald-syslog.c
@@ -219,7 +219,9 @@ size_t syslog_parse_identifier(const char **buf, char **identifier, char **pid)
if (t)
*identifier = t;
- e += strspn(p + e, WHITESPACE);
+ /* Single space is used as separator */
+ if (p[e] != '\0' && strchr(WHITESPACE, p[e]))
+ e++;
*buf = p + e;
return e;
diff --git a/src/journal/test-journal-syslog.c b/src/journal/test-journal-syslog.c
index 05f759817e..7294cde032 100644
--- a/src/journal/test-journal-syslog.c
+++ b/src/journal/test-journal-syslog.c
@@ -6,7 +6,7 @@
#include "string-util.h"
static void test_syslog_parse_identifier(const char *str,
- const char *ident, const char *pid, int ret) {
+ const char *ident, const char *pid, const char *rest, int ret) {
const char *buf = str;
_cleanup_free_ char *ident2 = NULL, *pid2 = NULL;
int ret2;
@@ -16,18 +16,22 @@ static void test_syslog_parse_identifier(const char *str,
assert_se(ret == ret2);
assert_se(ident == ident2 || streq_ptr(ident, ident2));
assert_se(pid == pid2 || streq_ptr(pid, pid2));
+ assert_se(streq(buf, rest));
}
int main(void) {
- test_syslog_parse_identifier("pidu[111]: xxx", "pidu", "111", 11);
- test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, 6);
- test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, 7);
- test_syslog_parse_identifier("pidu xxx", NULL, NULL, 0);
- test_syslog_parse_identifier(":", "", NULL, 1);
- test_syslog_parse_identifier(": ", "", NULL, 3);
- test_syslog_parse_identifier("pidu:", "pidu", NULL, 5);
- test_syslog_parse_identifier("pidu: ", "pidu", NULL, 6);
- test_syslog_parse_identifier("pidu : ", NULL, NULL, 0);
+ test_syslog_parse_identifier("pidu[111]: xxx", "pidu", "111", "xxx", 11);
+ test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, "xxx", 6);
+ test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, " xxx", 6);
+ test_syslog_parse_identifier("pidu xxx", NULL, NULL, "pidu xxx", 0);
+ test_syslog_parse_identifier(" pidu xxx", NULL, NULL, " pidu xxx", 0);
+ test_syslog_parse_identifier("", NULL, NULL, "", 0);
+ test_syslog_parse_identifier(" ", NULL, NULL, " ", 0);
+ test_syslog_parse_identifier(":", "", NULL, "", 1);
+ test_syslog_parse_identifier(": ", "", NULL, " ", 2);
+ test_syslog_parse_identifier("pidu:", "pidu", NULL, "", 5);
+ test_syslog_parse_identifier("pidu: ", "pidu", NULL, "", 6);
+ test_syslog_parse_identifier("pidu : ", NULL, NULL, "pidu : ", 0);
return 0;
}
--
2.11.0

2
meta/recipes-core/systemd/systemd_239.bb
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@@ -41,6 +41,8 @@ SRC_URI += "file://touchscreen.rules \
file://0024-journald-do-not-store-the-iovec-entry-for-process-co.patch \
file://0025-journald-set-a-limit-on-the-number-of-fields-1k.patch \
file://0026-journal-remote-set-a-limit-on-the-number-of-fields-i.patch \
file://0027-journal-fix-syslog_parse_identifier.patch \
file://0028-journal-do-not-remove-multiple-spaces-after-identifi.patch \
"
# patches made for musl are only applied on TCLIBC is musl