CVE-2020-6058Public exploitNetwork attack vector

Memory disclosure and crash via wrapped BER length

Published Feb 4, 2020 · Updated Aug 4, 2024

Out-of-bounds read in Mini-SNMPD 1.4 allows remote attackers to disclose process memory or crash the daemon via a crafted SNMP request. The decode_cnt function subtracts an attacker-controlled BER integer length from the packet size without first ensuring that the length fits, so size_t wraparound lets its loop read beyond the heap packet buffer. Network access to the SNMP listener is sufficient; repeated malformed requests disclose memory four bytes at a time, while a large offset causes a crash.

CVSS severity8.2
High
EPSS probability2.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Mini-SNMPD 1.4 allows remote attackers to disclose process memory or crash the daemon via a crafted SNMP request. The decode_cnt function subtracts an attacker-controlled BER integer length from the packet size without first ensuring that the length fits, so size_t wraparound lets its loop read beyond the heap packet buffer. Network access to the SNMP listener is sufficient; repeated malformed requests disclose memory four bytes at a time, while a large offset causes a crash.

The record

CVE
CVE-2020-6058
Published
Feb 4, 2020
Updated
Aug 4, 2024
Vendor
Troglobit
Product
Mini-SNMPD
Classifications
CWE-190, CWE-125, T1499.004, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Mini-SNMPD 1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Troglobit · Mini-SNMPDversion=Mini-SNMPD 1.4

Published CVSS scores

8.2Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:P
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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