forked from rpms/glibc
33 lines
1.2 KiB
Diff
33 lines
1.2 KiB
Diff
|
commit 1263d583d2e28afb8be53f8d6922f0842036f35d
|
||
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
||
|
|
Date: Thu Apr 25 15:00:45 2024 +0200
|
||
|
|
|
||
|
|
CVE-2024-33599: nscd: Stack-based buffer overflow in netgroup cache (bug 31677)
|
||
|
|
|
||
|
|
Using alloca matches what other caches do. The request length is
|
||
|
|
bounded by MAXKEYLEN.
|
||
|
|
|
||
|
|
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
|
||
|
|
(cherry picked from commit 87801a8fd06db1d654eea3e4f7626ff476a9bdaa)
|
||
|
|
|
||
|
|
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
|
||
|
|
index 0c6e46f15c5d7139..f227dc7fa2856e38 100644
|
||
|
|
--- a/nscd/netgroupcache.c
|
||
|
|
+++ b/nscd/netgroupcache.c
|
||
|
|
@@ -502,12 +502,13 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
|
||
|
|
= (struct indataset *) mempool_alloc (db,
|
||
|
|
sizeof (*dataset) + req->key_len,
|
||
|
|
1);
|
||
|
|
- struct indataset dataset_mem;
|
||
|
|
bool cacheable = true;
|
||
|
|
if (__glibc_unlikely (dataset == NULL))
|
||
|
|
{
|
||
|
|
cacheable = false;
|
||
|
|
- dataset = &dataset_mem;
|
||
|
|
+ /* The alloca is safe because nscd_run_worker verfies that
|
||
|
|
+ key_len is not larger than MAXKEYLEN. */
|
||
|
|
+ dataset = alloca (sizeof (*dataset) + req->key_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
datahead_init_pos (&dataset->head, sizeof (*dataset) + req->key_len,
|