Infinite loop in frr - CVE-2023-3748

Vulnerability identifier: #VU78619

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-2023-3748

CWE-ID: CWE-835

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 infinite loop when processing hello messages. A remote attacker can send specially crafted hello messages with the unicast flag set, the interval field set to 0, or any TLV that contains a sub-TLV with the Mandatory flag set to consume all available system resources and cause denial of service conditions.

frr
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
Server Applications Module
openSUSE Leap
Ubuntu
frr (Ubuntu package)
libfrrzmq0
libfrr0-debuginfo
libfrrcares0
frr-debugsource
libfrrfpm_pb0-debuginfo
libfrrsnmp0
frr
frr-debuginfo
libfrrospfapiclient0-debuginfo
libfrrfpm_pb0
libmlag_pb0-debuginfo
libfrrospfapiclient0
libfrr_pb0
frr-devel
libfrr0
libfrr_pb0-debuginfo
libfrrzmq0-debuginfo
libfrrcares0-debuginfo
libfrrsnmp0-debuginfo
libmlag_pb0

Install updates from vendor's website.

frr - update to 8.5
frr (Ubuntu package) - update to 8.4.2-1ubuntu1.2
libfrrzmq0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrcares0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-debugsource - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrfpm_pb0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrsnmp0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrospfapiclient0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrfpm_pb0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libmlag_pb0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrospfapiclient0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr_pb0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
frr-devel - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrr_pb0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrzmq0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrcares0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libfrrsnmp0-debuginfo - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1
libmlag_pb0 - addressed in versions 8.4-150500.4.8.1, 8.5.6-150500.4.30.1

• https://bugzilla.redhat.com/show_bug.cgi?id=2223668
• https://access.redhat.com/security/cve/CVE-2023-3748

• Denial of service in FRRouting
• Ubuntu update for frr
• SUSE update for frr
• SUSE update for frr