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Fencer Vulns
medium 6.5

CVE-2022-44793 json

handle_ipv6IpForwarding in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.4.3 through 5.9.3 has a NULL Pointer Exception bug that can be…

published 2022-11-07 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-47725

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
53.5%
EPSS 53.5% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

handle_ipv6IpForwarding in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.4.3 through 5.9.3 has a NULL Pointer Exception bug that can be used by a remote attacker to cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.

Patch / fix

  • net-snmp Debian 14, Debian 13, Debian 12 5.9.3+dfsg-2

debian advisories DEBIAN-CVE-2022-44793

  • net-snmp Ubuntu 18.04 LTS 5.7.3+dfsg-1.8ubuntu3.8
  • net-snmp Ubuntu 20.04 LTS 5.8+dfsg-2ubuntu2.6
  • net-snmp Ubuntu 22.04 LTS 5.9.1+dfsg-1ubuntu2.4
  • net-snmp Ubuntu Pro 14.04 LTS 5.7.2~dfsg-8.1ubuntu3.3+esm3
  • net-snmp Ubuntu Pro 16.04 LTS 5.7.3+dfsg-1ubuntu4.6+esm1

ubuntu advisories UBUNTU-CVE-2022-44793

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • net-snmp RHEL 8 1:5.8-27.el8
  • net-snmp-libs RHEL 8 1:5.8-27.el8
  • net-snmp-perl RHEL 8 1:5.8-27.el8
  • net-snmp-utils RHEL 8 1:5.8-27.el8
  • net-snmp-agent-libs RHEL 8 1:5.8-27.el8
  • net-snmp RHEL 9 1:5.9.1-9.el9
  • net-snmp-libs RHEL 9 1:5.9.1-9.el9
  • net-snmp-perl RHEL 9 1:5.9.1-9.el9

red hat advisories RHSA-2023:2969RHSA-2023:2444

  • net-snmp SLE Real Time 15 SP3, SLE Module for Package Hub 15 SP4, SLE Module for Basesystem 15 SP4 +3 more 5.9.3-150300.15.8.1
  • net-snmp SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 5.7.3-11.6.1

suse advisories SUSE-SU-2023:0075-1SUSE-SU-2023:0068-1

  • net-snmp openSUSE Tumbleweed 5.9.3-4.1

opensuse advisories openSUSE-SU-2024:12598-1

  • net-snmp AlmaLinux 8 1:5.8-27.el8
  • net-snmp-libs AlmaLinux 8 1:5.8-27.el8
  • net-snmp-perl AlmaLinux 8 1:5.8-27.el8
  • net-snmp-utils AlmaLinux 8 1:5.8-27.el8
  • net-snmp-agent-libs AlmaLinux 8 1:5.8-27.el8
  • net-snmp AlmaLinux 9 1:5.9.1-9.el9
  • net-snmp-libs AlmaLinux 9 1:5.9.1-9.el9
  • net-snmp-perl AlmaLinux 9 1:5.9.1-9.el9

almalinux advisories ALSA-2023:2969ALSA-2023:2444

  • net-snmp Alpine 3.16, Alpine 3.15, Alpine 3.14 5.9.3-r1
  • net-snmp Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 5.9.3-r2

alpine advisories ALPINE-CVE-2022-44793

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • net-snmp CBL-Mariner 2.0, Azure Linux 3.0 5.9.4-1

azure linux advisories AZL-11386AZL-41810

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-44793 updated cvss 6.5

net-snmp: NULL Pointer Exception when handling pv6IpForwarding

  • Red Hat Enterprise Linux 6 net-snmp, net-snmp-libs, net-snmp-perl, net-snmp-utils, net-snmp-python Red Hat Enterprise Linux 7 net-snmp, net-snmp-gui, net-snmp-libs, net-snmp-perl, net-snmp-utils, net-snmp-python, +2 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) net-snmp 5.8-27.el8, net-snmp-perl 5.8-27.el8, net-snmp-utils 5.8-27.el8, net-snmp-agent-libs 5.8-27.el8
    fixed: vendor fix RHSA-2023:2969
  • Red Hat Enterprise Linux AppStream (v. 9) net-snmp 5.9.1-9.el9, net-snmp-libs 5.9.1-9.el9, net-snmp-perl 5.9.1-9.el9, net-snmp-utils 5.9.1-9.el9, python3-net-snmp 5.9.1-9.el9, net-snmp-agent-libs 5.9.1-9.el9
    fixed: vendor fix RHSA-2023:2444
  • Red Hat Enterprise Linux BaseOS (v. 8) net-snmp 5.8-27.el8, net-snmp-libs 5.8-27.el8
    fixed: vendor fix RHSA-2023:2969

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-24-165-10 updated cvss 6.5

Siemens SIMATIC and SIPLUS

  • Siemens SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) <V2.3 Siemens SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) <V2.3 Siemens SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) <V2.3
    affected: fixed in V2.3 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

53.46% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/net-snmp/net-snmp/issues/475 referenced PoC, tagged "exploit" by a source, unverified
  • gist.github.com https://gist.github.com/menglong2234/d07a65b5028145c9f4e1d1db8c4c202f referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.