NULL pointer dereference in frr - CVE-2023-41909

Vulnerability identifier: #VU81445

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-41909

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the bgp_nlri_parse_flowspec() function in bgpd/bgp_flowspec.c. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

frr
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
SUSE Linux Enterprise Server 15 SP3 LTSS
Server Applications Module
openSUSE Leap
Ubuntu
Fedora
frr (Ubuntu package)
libfrrfpm_pb0
libfrr_pb0
frr-debugsource
libfrrsnmp0
libfrrgrpc_pb0-debuginfo
libfrr0
libmlag_pb0-debuginfo
libfrrzmq0-debuginfo
libfrrospfapiclient0-debuginfo
libfrrospfapiclient0
libfrrgrpc_pb0
libfrrcares0-debuginfo
frr-debuginfo
libmlag_pb0
frr
libfrrfpm_pb0-debuginfo
frr-devel
libfrrcares0
libfrr_pb0-debuginfo
libfrr0-debuginfo
libfrrzmq0
libfrrsnmp0-debuginfo
frr-selinux
frr-doc
frr (Red Hat package)
Red Hat OpenShift Container Platform

Install updates from vendor's website.

frr - addressed in versions 8.5.3, 9.0.1
frr (Ubuntu package) - addressed in versions Ubuntu Pro, 8.1-1ubuntu1.6, 8.4.2-1ubuntu1.4
Red Hat OpenShift Container Platform - update to 4.17.0
libfrrfpm_pb0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr_pb0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-debugsource - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrsnmp0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrgrpc_pb0-debuginfo - update to 7.4-150300.4.17.1
libfrr0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libmlag_pb0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrzmq0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrospfapiclient0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrospfapiclient0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrgrpc_pb0 - update to 7.4-150300.4.17.1
libfrrcares0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libmlag_pb0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrfpm_pb0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-devel - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrcares0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr_pb0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrzmq0 - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrsnmp0-debuginfo - addressed in versions 7.4-150300.4.17.1, 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-selinux - update to 7.5.1-16.0.4
frr - update to 7.5.1-16.0.4
frr-doc - update to 7.5.1-16.0.4
frr (Red Hat package) - addressed in versions 7.5.1-22.el8, 8.5.3-4.el9
frr - addressed in versions 8.5.3-1.fc37, 8.5.3-1.fc38, 8.5.3-1.fc39

• https://github.com/FRRouting/frr/pull/13222/commits/cfd04dcb3e689754a72507d086ba3b9709fc5ed8
• https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html

• Multiple vulnerabilities in FRRouting FRR
• SUSE update for frr
• SUSE update for frr
• Ubuntu update for frr
• Fedora 38 update for frr
• Fedora 37 update for frr
• Fedora 39 update for frr
• Red Hat Enterprise Linux 9 update for frr
• Red Hat Enterprise Linux 8 update for frr
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.17
• SUSE update for frr
• Anolis OS update for frr