CVE-2015-5621

HIGH

net-snmp < 5.7.2 - Denial of Service and Possible Remote Code Execution via Crafted SNMP PDU

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2015-5621. PoCs published by Magnus Klaaborg Stubman.

AI-analyzed exploit summary This exploit demonstrates a remote Denial of Service (DoS) vulnerability in NET-SNMP (CVE-2018-18065) by sending a malformed base64-decoded payload to a vulnerable snmpd instance, causing a segmentation fault. The PoC includes a base64-encoded payload and a command to trigger the crash.

Description

The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted packet.

Exploits (1)

exploitdb WORKING POC
by Magnus Klaaborg Stubman · textdoslinux
https://www.exploit-db.com/exploits/45547

This exploit demonstrates a remote Denial of Service (DoS) vulnerability in NET-SNMP (CVE-2018-18065) by sending a malformed base64-decoded payload to a vulnerable snmpd instance, causing a segmentation fault. The PoC includes a base64-encoded payload and a command to trigger the crash.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: NET-SNMP 5.7.3
Auth required
Prerequisites: knowledge of the SNMP community string (e.g., 'public') · network access to the target snmpd service
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (15)

Core 15
Core References
Mailing List vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-updates/2015-09/msg00004.html
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45547/
Vendor Advisory vendor-advisory x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2015-1636.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1033304
Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1212408
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2711-1
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2015/04/16/15
Exploit mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2015/04/13/1
Vendor Advisory x_refsource_confirm
http://support.citrix.com/article/CTX209443
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4154
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2015/07/31/1
Product x_refsource_confirm
https://sourceforge.net/p/net-snmp/bugs/2615/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/76380

Scores

CVSS v3 7.5
EPSS 0.4000
EPSS Percentile 98.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-19 CWE-190
Status published
Products (1)
net-snmp/net-snmp < 5.7.2
Published Aug 19, 2015
Tracked Since Feb 18, 2026