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OPENAFS-SA-2018-002 ptserver: prevent PR_ListEntries information leak

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PR_ListEntries (pts listentries) does not properly initialize its output
buffers.  This leaks ptserver memory over the wire:

struct prlistentries
- up to 62 bytes for each entry name (PR_MAXNAMELEN 64 - 'a\0')

Initialize the buffer, and remove the now redundant memset for the
reserved fields.

(cherry picked from commit 9d1aeb5d761581a35bef2042e9116b96e9ae3bf5)

(cherry picked from commit e19ad4cdde463d2bbb4b815525da992bd5fc2648)

(cherry picked from commit 7ee25861685a4f56b304627ca2a0dbfed179646d)

Change-Id: I42d32876ddf8fa98744620fdf75b4e0783b93aba
This commit is contained in:
Mark Vitale 2018-06-26 03:37:37 -04:00 committed by Benjamin Kaduk
parent c67fe473f7
commit 6cdfce3c9a
1 changed files with 1 additions and 1 deletions
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2
src/ptserver/ptprocs.c
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@ -1647,6 +1647,7 @@ put_prentries(struct prentry *tentry, prentries *bulkentries)
entry = (struct prlistentries *)bulkentries->prentries_val;
entry += bulkentries->prentries_len;
memset(entry, 0, sizeof(*entry));
entry->flags = tentry->flags >> PRIVATE_SHIFT;
if (entry->flags == 0) {
entry->flags =
@ -1661,7 +1662,6 @@ put_prentries(struct prentry *tentry, prentries *bulkentries)
entry->nusers = tentry->nusers;
entry->count = tentry->count;
strncpy(entry->name, tentry->name, PR_MAXNAMELEN);
memset(entry->reserved, 0, sizeof(entry->reserved));
bulkentries->prentries_len++;
return 0;
}