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Advisories

FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions

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severity
medium
date
Affecting

  • FRRouting < 10.5.3

CWE
  • CWE-190 Integer Overflow or Wraparound
  • CWE-125 Out-of-bounds Read
CVSS
6
CVSS V4 Vector
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.
Description
FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator variable truncates uint32_t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer advancement continues unchecked. Attackers with an established OSPF adjacency can send a crafted LS Update packet with a malicious Type 10 or Type 11 Opaque LSA to trigger out-of-bounds memory reads and crash all affected routers in the OSPF area or autonomous system.

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