diff options
Diffstat (limited to 'meta/recipes-core/systemd/systemd/0025-journald-set-a-limit-on-the-number-of-fields.patch')
| -rw-r--r-- | meta/recipes-core/systemd/systemd/0025-journald-set-a-limit-on-the-number-of-fields.patch | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/meta/recipes-core/systemd/systemd/0025-journald-set-a-limit-on-the-number-of-fields.patch b/meta/recipes-core/systemd/systemd/0025-journald-set-a-limit-on-the-number-of-fields.patch deleted file mode 100644 index ae9ef5de56..0000000000 --- a/meta/recipes-core/systemd/systemd/0025-journald-set-a-limit-on-the-number-of-fields.patch +++ /dev/null @@ -1,139 +0,0 @@ -From 7cad044b72406cbadf048da432c29afea74c3c10 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl> -Date: Wed, 5 Dec 2018 22:45:02 +0100 -Subject: [PATCH] journald: set a limit on the number of fields - -The fix for CVE-2018-16865 is plucked from two commits that have -been pushed to systemd master. - -journald: set a limit on the number of fields (1k) - -We allocate a iovec entry for each field, so with many short entries, -our memory usage and processing time can be large, even with a relatively -small message size. Let's refuse overly long entries. - -CVE-2018-16865 -https://bugzilla.redhat.com/show_bug.cgi?id=1653861 - -What from I can see, the problem is not from an alloca, despite what the CVE -description says, but from the attack multiplication that comes from creating -many very small iovecs: (void* + size_t) for each three bytes of input message. - -Patch backported from systemd master at -052c57f132f04a3cf4148f87561618da1a6908b4. - -journal-remote: set a limit on the number of fields in a message - -Existing use of E2BIG is replaced with ENOBUFS (entry too long), and E2BIG is -reused for the new error condition (too many fields). - -This matches the change done for systemd-journald, hence forming the second -part of the fix for CVE-2018-16865 -(https://bugzilla.redhat.com/show_bug.cgi?id=1653861). - -Patch backported from systemd master at -ef4d6abe7c7fab6cbff975b32e76b09feee56074. -with the changes applied by 7fdb237f5473cb8fc2129e57e8a0039526dcb4fd -removed. - -CVE: CVE-2018-16865 -Upstream-Status: Backport -Signed-off-by: Marcus Cooper <marcusc@axis.com> ---- - src/basic/journal-importer.c | 5 ++++- - src/basic/journal-importer.h | 3 +++ - src/journal-remote/journal-remote-main.c | 7 ++++++- - src/journal-remote/journal-remote.c | 5 ++++- - src/journal/journald-native.c | 5 +++++ - 5 files changed, 22 insertions(+), 3 deletions(-) - -diff --git a/src/basic/journal-importer.c b/src/basic/journal-importer.c -index ca203bbbfc..3ac55a66d9 100644 ---- a/src/basic/journal-importer.c -+++ b/src/basic/journal-importer.c -@@ -23,6 +23,9 @@ enum { - }; - - static int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) { -+ if (iovw->count >= ENTRY_FIELD_COUNT_MAX) -+ return -E2BIG; -+ - if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1)) - return log_oom(); - -@@ -98,7 +101,7 @@ static int get_line(JournalImporter *imp, char **line, size_t *size) { - imp->scanned = imp->filled; - if (imp->scanned >= DATA_SIZE_MAX) { - log_error("Entry is bigger than %u bytes.", DATA_SIZE_MAX); -- return -E2BIG; -+ return -ENOBUFS; - } - - if (imp->passive_fd) -diff --git a/src/basic/journal-importer.h b/src/basic/journal-importer.h -index f49ce734a1..c4ae45d32d 100644 ---- a/src/basic/journal-importer.h -+++ b/src/basic/journal-importer.h -@@ -16,6 +16,9 @@ - #define DATA_SIZE_MAX (1024*1024*768u) - #define LINE_CHUNK 8*1024u - -+/* The maximum number of fields in an entry */ -+#define ENTRY_FIELD_COUNT_MAX 1024 -+ - struct iovec_wrapper { - struct iovec *iovec; - size_t size_bytes; -diff --git a/src/journal-remote/journal-remote-main.c b/src/journal-remote/journal-remote-main.c -index 8fda9d1499..3a01fef646 100644 ---- a/src/journal-remote/journal-remote-main.c -+++ b/src/journal-remote/journal-remote-main.c -@@ -212,7 +212,12 @@ static int process_http_upload( - break; - else if (r < 0) { - log_warning("Failed to process data for connection %p", connection); -- if (r == -E2BIG) -+ if (r == -ENOBUFS) -+ return mhd_respondf(connection, -+ r, MHD_HTTP_PAYLOAD_TOO_LARGE, -+ "Entry is above the maximum of %u, aborting connection %p.", -+ DATA_SIZE_MAX, connection); -+ else if (r == -E2BIG) - return mhd_respondf(connection, - r, MHD_HTTP_PAYLOAD_TOO_LARGE, - "Entry is too large, maximum is " STRINGIFY(DATA_SIZE_MAX) " bytes."); -diff --git a/src/journal-remote/journal-remote.c b/src/journal-remote/journal-remote.c -index beb75a1cb4..67e3a70c06 100644 ---- a/src/journal-remote/journal-remote.c -+++ b/src/journal-remote/journal-remote.c -@@ -408,7 +408,10 @@ int journal_remote_handle_raw_source( - log_debug("%zu active sources remaining", s->active); - return 0; - } else if (r == -E2BIG) { -- log_notice_errno(E2BIG, "Entry too big, skipped"); -+ log_notice("Entry with too many fields, skipped"); -+ return 1; -+ } else if (r == -ENOBUFS) { -+ log_notice("Entry too big, skipped"); - return 1; - } else if (r == -EAGAIN) { - return 0; -diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c -index 5ff22a10af..951d092053 100644 ---- a/src/journal/journald-native.c -+++ b/src/journal/journald-native.c -@@ -140,6 +140,11 @@ static int server_process_entry( - } - - /* A property follows */ -+ if (n > ENTRY_FIELD_COUNT_MAX) { -+ log_debug("Received an entry that has more than " STRINGIFY(ENTRY_FIELD_COUNT_MAX) " fields, ignoring entry."); -+ r = 1; -+ goto finish; -+ } - - /* n existing properties, 1 new, +1 for _TRANSPORT */ - if (!GREEDY_REALLOC(iovec, m, --- -2.11.0 - |