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SUSE:SLE-12-SP3:Update
xen
CVE-2020-29130-qemut-out-of-bounds-access-while...
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File CVE-2020-29130-qemut-out-of-bounds-access-while-processing-ARP-packets.patch of Package xen
While processing ARP/NCSI packets in 'arp_input' or 'ncsi_input' routines, ensure that pkt_len is large enough to accommodate the respective protocol headers, lest it should do an OOB access. Add check to avoid it. Reported-by: Qiuhao Li <Qiuhao.Li at outlook.com> Signed-off-by: Prasad J Pandit <pjp at fedoraproject.org> --- src/ncsi.c | 4 ++++ src/slirp.c | 4 ++++ 2 files changed, 8 insertions(+) Index: xen-4.9.4-testing/tools/qemu-xen-traditional-dir-remote/slirp/slirp.c =================================================================== --- xen-4.9.4-testing.orig/tools/qemu-xen-traditional-dir-remote/slirp/slirp.c +++ xen-4.9.4-testing/tools/qemu-xen-traditional-dir-remote/slirp/slirp.c @@ -604,6 +604,10 @@ static void arp_input(const uint8_t *pkt int ar_op; struct ex_list *ex_ptr; + if (pkt_len < ETH_HLEN + sizeof(struct arphdr)) { + return; /* packet too short */ + } + ar_op = ntohs(ah->ar_op); switch(ar_op) { case ARPOP_REQUEST:
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