Remote code execution in Net-snmp - CVE-2015-5621

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Main Vulnerability Database Vulnerabilities #VU2215

Remote code execution in Net-snmp - CVE-2015-5621

Published: December 21, 2016 / Updated: March 28, 2018


Vulnerability identifier: #VU2215
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-5621
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to the snmp_pdu_parse function in snmp_api.c does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails. A remote attacker can supply specially crafted input and cause denial of service or execute arbitrary code with elevated privileges.

Affected software

Net-snmp
Amazon Linux AMI
Debian Linux
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux EUS Compute Node
AMC Manager
SD-330AC
TIM 1531 IRC
SIMATIC CP 1628
SIMATIC CP 1623
SCALANCE S627-2M
SCALANCE S623
SCALANCE S612
SCALANCE S602
SIMATIC CP443-1 OPC UA
SIMATIC CP 443-1 Advanced
SIMATIC CP 443-1 Standard
SIMATIC CP 343-1 Advanced
SIMATIC CP 1626
IE/PB LINK PN IO
net-snmp (Alpine package)
linux-firmware (Alpine package)

How to mitigate CVE-2015-5621

Install update from vendor's website.

AMC Manager - update to 5.1.0
SD-330AC - update to 1.50
SIMATIC CP 1628 - update to 14.00.15.00_51.25.00.01
SIMATIC CP 1623 - update to 14.00.15.00_51.25.00.01
net-snmp (Alpine package) - update to 5.7.2.1-r2
linux-firmware (Alpine package) - update to 20180615-r2

External References

Related Security Bulletins