Detections
Analytics

Oracle Linux 9 : frr (ELSA-2023-6434)

high Nessus Plugin ID 185875

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

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

 - 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)

 - 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 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)

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

Solution

Update the affected frr and / or frr-selinux packages.

See Also

https://linux.oracle.com/errata/ELSA-2023-6434.html

Plugin Details

Severity: High

ID: 185875

File Name: oraclelinux_ELSA-2023-6434.nasl

Version: 1.0

Type: local

Agent: unix

Published: 11/16/2023

Updated: 11/16/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2022-36440

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:oracle:linux:9:3:appstream_base, cpe:/a:oracle:linux:9::appstream, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:frr, p-cpe:/a:oracle:linux:frr-selinux

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/11/2023

Vulnerability Publication Date: 4/3/2023

Reference Information

CVE: CVE-2022-36440, CVE-2022-40302, CVE-2022-40318, CVE-2022-43681