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authorGuy Harris <guy@alum.mit.edu>2017-02-03 15:14:51 -0800
committerDenis Ovsienko <denis@ovsienko.info>2017-09-13 12:25:44 +0100
commit19d25dd8781620cd41bf178a5e2e27fc1cf242d0 (patch)
tree0de33783070d48ec47742a43b5c232a6388ffc96 /tests
parent1dcd10aceabbc03bf571ea32b892c522cbe923de (diff)
downloadtcpdump-19d25dd8781620cd41bf178a5e2e27fc1cf242d0.tar.gz
CVE-2017-12898/NFS: Fix bounds checking.
Fix the bounds checking for the NFSv3 WRITE procedure to check whether the length of the opaque data being written is present in the captured data, not just whether the byte count is present in the captured data. furthest forward in the packet, not the item before it. (This also lets us eliminate the check for the "stable" argument being present in the captured data; rewrite the code to print that to make it a bit clearer.) Check that the entire ar_stat field is present in the capture. Note that parse_wcc_attr() is called after we've already checked whether the wcc_data is present. Check before fetching the "access" part of the NFSv3 ACCESS results. This fixes a buffer over-read discovered by Kamil Frankowicz. Include a test for the "check before fetching the "access" part..." fix, using the capture supplied by the reporter(s).
Diffstat (limited to 'tests')
-rw-r--r--tests/TESTLIST1
-rw-r--r--tests/nfs-attr-oobr.out305
-rw-r--r--tests/nfs-attr-oobr.pcapbin0 -> 7308 bytes
3 files changed, 306 insertions, 0 deletions
diff --git a/tests/TESTLIST b/tests/TESTLIST
index 986c18fe..248c5397 100644
--- a/tests/TESTLIST
+++ b/tests/TESTLIST
@@ -443,6 +443,7 @@ hoobr_pimv1 hoobr_pimv1.pcap hoobr_pimv1.out
hoobr_safeputs hoobr_safeputs.pcap hoobr_safeputs.out
isakmp-rfc3948-oobr isakmp-rfc3948-oobr.pcap isakmp-rfc3948-oobr.out
isoclns-oobr isoclns-oobr.pcap isoclns-oobr.out
+nfs-attr-oobr nfs-attr-oobr.pcap nfs-attr-oobr.out
# bad packets from Wilfried Kirsch
slip-bad-direction slip-bad-direction.pcap slip-bad-direction.out -ve
diff --git a/tests/nfs-attr-oobr.out b/tests/nfs-attr-oobr.out
new file mode 100644
index 00000000..44b2987d
--- /dev/null
+++ b/tests/nfs-attr-oobr.out
@@ -0,0 +1,305 @@
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+ 0x0010: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0020: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0030: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0040: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0050: 3030 00
+30:30:30:30:30:30 > 30:30:30:30:30:30, ethertype Unknown (0x3030), length 808464432:
+ 0x0000: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0010: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0020: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0030: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0040: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0050: 3030 00
+30:30:30:30:30:30 > 30:30:30:30:30:30, ethertype Unknown (0x3030), length 808464432:
+ 0x0000: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0010: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0020: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0030: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0040: 3030 3030 3030 3030 3030 3030 3030 3030 0000000000000000
+ 0x0050: 3030 00
+IP 48.48.48.48.12336 > 48.48.48.48.2049: NFS request xid 3056611558 12308 access [|nfs]
+IP 48.48.48.48.2049 > 48.48.48.48.12336: NFS reply xid 3056611558 reply ok 12308 access [|nfs]
diff --git a/tests/nfs-attr-oobr.pcap b/tests/nfs-attr-oobr.pcap
new file mode 100644
index 00000000..9c292ad2
--- /dev/null
+++ b/tests/nfs-attr-oobr.pcap
Binary files differ