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From abb072100e72c07c5cf98b02f5b1a15a48f4b496 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 4 Jan 2019 15:33:43 +0100
Subject: [PATCH] journal: fix syslog_parse_identifier()
Fixes #9829.
(cherry-picked from commit a6aadf4ae0bae185dc4c414d492a4a781c80ffe5)
Resolves: #1657794
[msekleta: Fix for CVE-2018-16866]
---
src/journal/journald-syslog.c | 6 +++---
src/journal/test-journal-syslog.c | 8 +++++++-
2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c
index 01d2bf69f4..3ea5d79c3a 100644
--- a/src/journal/journald-syslog.c
+++ b/src/journal/journald-syslog.c
@@ -209,7 +209,7 @@ 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 (;;) {
@@ -234,8 +234,8 @@ 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 c99ca0654b..f56a813774 100644
--- a/src/journal/test-journal-syslog.c
+++ b/src/journal/test-journal-syslog.c
@@ -22,7 +22,7 @@
#include "journald-syslog.h"
#include "macro.h"
-static void test_syslog_parse_identifier(const char* str,
+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;
@@ -38,7 +38,13 @@ 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;
}