CVE-2022-48805

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup

ax88179_rx_fixup() contains several out-of-bounds accesses that can be triggered by a malicious (or defective) USB device, in particular:

  • The metadata array (hdr_off..hdr_off+2*pkt_cnt) can be out of bounds, causing OOB reads and (on big-endian systems) OOB endianness flips.
  • A packet can overlap the metadata array, causing a later OOB endianness flip to corrupt data used by a cloned SKB that has already been handed off into the network stack.
  • A packet SKB can be constructed whose tail is far beyond its end, causing out-of-bounds heap data to be considered part of the SKB's data.

I have tested that this can be used by a malicious USB device to send a bogus ICMPv6 Echo Request and receive an ICMPv6 Echo Reply in response that contains random kernel heap data. It's probably also possible to get OOB writes from this on a little-endian system somehow - maybe by triggering skb_cow() via IP options processing -, but I haven't tested that.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 711b6bf3fb052f0a6b5b3205d50e30c0c2980382affected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 63f0cfb36c1f1964a59ce544156677601e2d8740affected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 1668781ed24da43498799aa4f65714a7de201930affected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < a0fd5492ee769029a636f1fb521716b022b1423daffected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 758290defe93a865a2880d10c5d5abd288b64b5daffected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < ffd0393adcdcefab7e131488e10dcfde5e02d6ebaffected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 9681823f96a811268265f35307072ad80713c274affected
LinuxLinuxe2ca90c276e1fc410d7cd3c1a4eee245ec902a20 < 57bc3d3ae8c14df3ceb4e17d26ddf9eeab304581affected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux4.9.303 <= 4.9.*unaffected
LinuxLinux4.14.268 <= 4.14.*unaffected
LinuxLinux4.19.231 <= 4.19.*unaffected
LinuxLinux5.4.180 <= 5.4.*unaffected
LinuxLinux5.10.101 <= 5.10.*unaffected
LinuxLinux5.15.24 <= 5.15.*unaffected
LinuxLinux5.16.10 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References