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Diffstat (limited to 'results/classifier/accel-gemma3:12b/vmm/646')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/vmm/646 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/vmm/646 b/results/classifier/accel-gemma3:12b/vmm/646 new file mode 100644 index 000000000..87ac7b5a1 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/vmm/646 @@ -0,0 +1,19 @@ + +Infinite loop in xhci_ring_chain_length() in hw/usb/hcd-xhci.c (CVE-2020-14394) +Description of problem: +An infinite loop issue was found in the USB xHCI controller emulation of QEMU. Specifically, function `xhci_ring_chain_length()` in hw/usb/hcd-xhci.c may get stuck while fetching empty TRBs from guest memory, since the exit conditions of the loop depend on values that are fully controlled by guest. A privileged guest user may exploit this issue to hang the QEMU process on the host, resulting in a denial of service. +Steps to reproduce: +Build and load `xhci.ko` from within the guest: + +1) make +2) insmod xhci.ko + +[Makefile](/uploads/98dbf7b4facc9b100817b3c8f63b5cb2/Makefile) + +[usb-xhci.h](/uploads/f225524b1553d8cf6c1dfa89369b6edc/usb-xhci.h) + +[xhci.c](/uploads/c635f742d12a2bba6ea472ddfe006d56/xhci.c) +Additional information: +This issue was reported by Gaoning Pan (Zhejiang University) and Xingwei Li (Ant Security Light-Year Lab). + +RH bug: https://bugzilla.redhat.com/show_bug.cgi?id=1908004. |