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Red Hat: CVE-2022-40318: denial of service by crafting a BGP OPEN message with an option of type in bgp_open_option_parse in the bgp_open.c 0xff (Multiple Advisories)

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Red Hat: CVE-2022-40318: denial of service by crafting a BGP OPEN message with an option of type in bgp_open_option_parse in the bgp_open.c 0xff (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/03/2023
Created
11/09/2023
Added
11/08/2023
Modified
12/15/2023

Description

An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.

Solution(s)

  • redhat-upgrade-frr
  • redhat-upgrade-frr-debuginfo
  • redhat-upgrade-frr-debugsource
  • redhat-upgrade-frr-selinux

References

  • DSA-5495
  • CVE-2022-40318
  • RHSA-2023:6434

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