Heap-based buffer overflow in Unbound - CVE-2024-43168

Vulnerability identifier: #VU96490

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-43168

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the cfg_mark_ports() function in config_file.c. A local user can pass a specially crafted file to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Unbound
Oracle Solaris
Ubuntu
openEuler
Anolis OS
SmartFabric Storage Software
libunbound2 (Ubuntu package)
unbound-host (Ubuntu package)
unbound (Ubuntu package)
libunbound8 (Ubuntu package)
python3-unbound
unbound-libs
unbound-help
unbound-devel
unbound-debugsource
unbound-debuginfo
unbound
unbound-anchor
unbound-utils

Install updates from vendor's website.

Unbound - update to 1.20.0
Oracle Solaris - update to 11.4 SRU 71
SmartFabric Storage Software - update to 1.4.3
libunbound2 (Ubuntu package) - update to Ubuntu Pro
unbound-host (Ubuntu package) - addressed in versions Ubuntu Pro, 1.9.4-2ubuntu1.8, 1.13.1-1ubuntu5.7, 1.19.2-1ubuntu3.2
unbound (Ubuntu package) - addressed in versions Ubuntu Pro, 1.9.4-2ubuntu1.8, 1.13.1-1ubuntu5.7, 1.19.2-1ubuntu3.2
libunbound8 (Ubuntu package) - addressed in versions 1.9.4-2ubuntu1.8, 1.13.1-1ubuntu5.7, 1.19.2-1ubuntu3.2
python3-unbound - update to 1.13.2-12
unbound-libs - update to 1.13.2-12
unbound-help - update to 1.13.2-12
unbound-devel - update to 1.13.2-12
unbound-debugsource - update to 1.13.2-12
unbound-debuginfo - update to 1.13.2-12
unbound - update to 1.13.2-12
python3-unbound - update to 1.17.1-5
unbound - update to 1.17.1-5
unbound-anchor - update to 1.17.1-5
unbound-devel - update to 1.17.1-5
unbound-libs - update to 1.17.1-5
unbound-utils - update to 1.17.1-5

• https://bugzilla.redhat.com/show_bug.cgi?id=2303462
• https://github.com/NLnetLabs/unbound/issues/1039
• https://github.com/NLnetLabs/unbound/pull/1040/files

• Privilege escalation in Unbound
• openEuler update for unbound
• Oracle Solaris update for thrid-party components
• Ubuntu update for unbound
• Dell SmartFabric Storage Software update for third-party components
• Anolis OS update for unbound