Null pointer dereference in Net-snmp - CVE-2018-18066

Vulnerability identifier: #VU15321

CSH Severity: Low

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-18066

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The vulnerability exists in the snmp_oid_compare() function, as defined in the snmplib/snmp_api.c source code file due to a NULL pointer exception bug. A remote attacker can send a malicious UDP packet, trigger a NULL pointer dereference condition, cause the application to crash.

Net-snmp
Arch Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Fedora
net-snmp (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
net-snmp
Data Computing Appliance (DCA)

Update to version 5.8.

Net-snmp - update to 5.8
net-snmp (Red Hat package) - addressed in versions 5.7.2-43.el7_7.6, 5.7.2-47.el7
Data Computing Appliance (DCA) - update to 4.3.0.0
net-snmp - addressed in versions 5.8-3.fc28, 5.8-3.fc29

• https://dumpco.re/blog/net-snmp-5.7.3-remote-dos

• Denial of service vulnerabilities in Net-snmp
• Arch Linux update for net-snmp
• Red Hat Enterprise Linux 7 update for net-snmp
• Red Hat Enterprise Linux 7 update for net-snmp
• Multiple vulnerabilities in Dell EMC Data Computing Appliance (DCA)
• Fedora 28 update for net-snmp
• Fedora 29 update for net-snmp