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| author | Florian Weimer <fweimer@redhat.com> | 2017-02-27 19:05:13 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2017-02-27 19:05:13 +0100 |
| commit | d42eed4a044e5e10dfb885cf9891c2518a72a491 (patch) | |
| tree | 29deb103217e1b09902f05cf49029a93cb76ad1a /ChangeLog | |
| parent | 963394a22b38c4ec92b6875a6c06d3b15d5c0d21 (diff) | |
| download | glibc-d42eed4a044e5e10dfb885cf9891c2518a72a491.tar.gz | |
sunrpc: Avoid use-after-free read access in clntudp_call [BZ #21115]
After commit bc779a1a5b3035133024b21e2f339fe4219fb11c
(CVE-2016-4429: sunrpc: Do not use alloca in clntudp_call
[BZ #20112]), ancillary data is stored on the heap,
but it is accessed after it has been freed.
The test case must be run under a heap debugger such as valgrind
to observe the invalid access. A malloc implementation which
immediately calls munmap on free would catch this bug as well.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -1,3 +1,11 @@ +2017-02-27 Florian Weimer <fweimer@redhat.com> + + [BZ #21115] + * sunrpc/clnt_udp.c (clntudp_call): Free ancillary data later. + * sunrpc/Makefile (tests): Add tst-udp-error. + (tst-udp-error): Link against libc.so explicitly. + * sunrpc/tst-udp-error: New file. + 2017-02-25 Zack Weinberg <zackw@panix.com> * sysdeps/generic/math_private.h: Use __BIG_ENDIAN and |