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.

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-6434 advisory.

    [8.3.1-11]
    - Resolves: RHEL-2263 - bgpd: Do not explicitly print MAXTTL value for ebgp-multihop vty output

    [8.3.1-10]
    - Related: #2216912 - adding sys_admin to capabilities

    [8.3.1-9]
    - Resolves: #2215346 - frr policy does not allow the execution of /usr/sbin/ipsec

    [8.3.1-8]
    - Resolves: #2216912 - SELinux is preventing FRR-Zebra to access to network namespaces

    [8.3.1-7]
    - Resolves: #2168855 - BFD not working through VRF

    [8.3.1-6]
    - Resolves: #2184870 - Reachable assertion in peek_for_as4_capability function
    - Resolves: #2196795 - denial of service by crafting a BGP OPEN message with an option of type 0xff
    - Resolves: #2196796 - denial of service by crafting a BGP OPEN message with an option of type 0xff
    - Resolves: #2196794 - out-of-bounds read exists in the BGP daemon of FRRouting

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:6434 advisory.

    FRRouting is free software that manages TCP/IP based routing protocols. It supports BGP4, OSPFv2, OSPFv3,     ISIS, RIP, RIPng, PIM, NHRP, PBR, EIGRP and BFD.

    Security Fix(es):

    * frr: Reachable assertion in peek_for_as4_capability function (CVE-2022-36440)

    * frr: denial of service by crafting a BGP OPEN message with an option of type 0xff (CVE-2022-40302)

    * frr: 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 (CVE-2022-40318)

    * frr: out-of-bounds read exists in the BGP daemon of FRRouting (CVE-2022-43681)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3573 advisory.

  - A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function.
    Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd,     resulting in DoS. (CVE-2022-36440)

  - 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. (CVE-2022-40302)

  - 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. (CVE-2022-40318)

  - An out-of-bounds read exists in the BGP daemon of FRRouting FRR through 8.4. When sending a malformed BGP     OPEN message that ends with the option length octet (or the option length word, in case of an extended     OPEN message), the FRR code reads of out of the bounds of the packet, throwing a SIGABRT signal and     exiting. This results in a bgpd daemon restart, causing a Denial-of-Service condition. (CVE-2022-43681)

  - An issue found in Frrouting bgpd v.8.4.2 allows a remote attacker to cause a denial of service via the     bgp_attr_psid_sub() function. (CVE-2023-31490)

  - FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of     service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation). (CVE-2023-38802)

  - An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c processes NLRIs if the attribute     length is zero. (CVE-2023-41358)

  - An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c can read the initial byte of the     ORF header in an ahead-of-stream situation. (CVE-2023-41360)

  - An issue was discovered in FRRouting FRR 9.0. bgpd/bgp_open.c does not check for an overly large length of     the rcv software version. (CVE-2023-41361)

  - An issue was discovered in FRRouting FRR through 9.0. bgp_nlri_parse_flowspec in bgpd/bgp_flowspec.c     processes malformed requests with no attributes, leading to a NULL pointer dereference. (CVE-2023-41909)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5495 advisory.

  - A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function.
    Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd,     resulting in DoS. (CVE-2022-36440)

  - 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. (CVE-2022-40302)

  - 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. (CVE-2022-40318)

  - An out-of-bounds read exists in the BGP daemon of FRRouting FRR through 8.4. When sending a malformed BGP     OPEN message that ends with the option length octet (or the option length word, in case of an extended     OPEN message), the FRR code reads of out of the bounds of the packet, throwing a SIGABRT signal and     exiting. This results in a bgpd daemon restart, causing a Denial-of-Service condition. (CVE-2022-43681)

  - An issue found in Frrouting bgpd v.8.4.2 allows a remote attacker to cause a denial of service via the     bgp_attr_psid_sub() function. (CVE-2023-31490)

  - FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of     service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation). (CVE-2023-38802)

  - An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c processes NLRIs if the attribute     length is zero. (CVE-2023-41358)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
185875	Oracle Linux 9 : frr (ELSA-2023-6434)	Nessus	Oracle Linux Local Security Checks	high
185113	RHEL 9 : frr (RHSA-2023:6434)	Nessus	Red Hat Local Security Checks	high
181647	Debian DLA-3573-1 : frr - LTS security update	Nessus	Debian Local Security Checks	critical
181250	Debian DSA-5495-1 : frr - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2022-40302

medium

Tenable Plugins

high

high

critical

high