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From 573e86d7e9f0038044d5cba2a1a543e24b063a79 Mon Sep 17 00:00:00 2001
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From: Aleksander Adamowski <olo@fb.com>
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Date: Mon, 11 Jan 2016 15:26:41 -0800
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Subject: [PATCH] Fix miscalculated buffer size and uses of size-unlimited
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sprintf() function.
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Not sure if this results in an exploitable buffer overflow, probably not
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since the the int value is likely sanitized somewhere earlier and it's
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being put through a bit mask shortly before being used.
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Cherry-picked from: 13f5402c6b734ed4c2b3e8b7c3d3bf6d815e7661
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Related: #1318994
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---
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src/journal/journald-syslog.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c
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index 8602b4a95d..b499a0d381 100644
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--- a/src/journal/journald-syslog.c
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+++ b/src/journal/journald-syslog.c
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@@ -317,7 +317,7 @@ void server_process_syslog_message(
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size_t label_len) {
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char syslog_priority[sizeof("PRIORITY=") + DECIMAL_STR_MAX(int)],
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- syslog_facility[sizeof("SYSLOG_FACILITY") + DECIMAL_STR_MAX(int)];
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+ syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int)];
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const char *message = NULL, *syslog_identifier = NULL, *syslog_pid = NULL;
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struct iovec iovec[N_IOVEC_META_FIELDS + 6];
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unsigned n = 0;
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@@ -348,11 +348,11 @@ void server_process_syslog_message(
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IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog");
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- sprintf(syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK);
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+ snprintf(syslog_priority, sizeof(syslog_priority), "PRIORITY=%i", priority & LOG_PRIMASK);
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IOVEC_SET_STRING(iovec[n++], syslog_priority);
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if (priority & LOG_FACMASK) {
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- sprintf(syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority));
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+ snprintf(syslog_facility, sizeof(syslog_facility), "SYSLOG_FACILITY=%i", LOG_FAC(priority));
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IOVEC_SET_STRING(iovec[n++], syslog_facility);
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}
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