Description
handle_ipDefaultTTL in agent/mibgroup/ip-mib/ip_scalars.c in Net-SNMP 5.8 through 5.9.3 has a NULL Pointer Exception bug that can be used by a remote attacker (who has write access) to cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | net-snmp | 5.9.3+dfsg-2 | — |
| Debian 13 | net-snmp | 5.9.3+dfsg-2 | — |
| Debian 12 | net-snmp | 5.9.3+dfsg-2 | — |
| Debian 11 | net-snmp | 5.9+dfsg-4+deb11u2 | DLA-4381-1 |
| Debian 10 | net-snmp | 5.7.3+dfsg-5+deb10u4 | DLA-3270-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | net-snmp | 5.9.1+dfsg-1ubuntu2.4 | USN-5795-1 |
| Ubuntu 20.04 LTS | net-snmp | 5.8+dfsg-2ubuntu2.6 | USN-5795-1 |
| Ubuntu 18.04 LTS | net-snmp | 5.7.3+dfsg-1.8ubuntu3.8 | USN-5795-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | net-snmp | 5.7.3+dfsg-1ubuntu4.6+esm1 | USN-5795-2 |
| Ubuntu Pro 14.04 LTS | net-snmp | 5.7.2~dfsg-8.1ubuntu3.3+esm3 | USN-5795-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | net-snmp +6 | 1:5.9.1-9.el9 | RHSA-2023:2444 |
| RHEL 8 | net-snmp +5 | 1:5.8-27.el8 | RHSA-2023:2969 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | net-snmp +6 | 1:5.9.1-9.el9 | ALSA-2023:2444 |
| AlmaLinux 8 | net-snmp +5 | 1:5.8-27.el8 | ALSA-2023:2969 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | net-snmp | 5.9.3-150300.15.8.1 | SUSE-SU-2023:0075-1 |
| SLES 12 SP5 | net-snmp | 5.7.3-11.6.1 | SUSE-SU-2023:0068-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | net-snmp | 5.7.3-11.6.1 | SUSE-SU-2023:0068-1 |
| SLE Real Time 15 SP3 | net-snmp | 5.9.3-150300.15.8.1 | SUSE-SU-2023:0075-1 |
| SLE Micro 5.3 | net-snmp | 5.9.3-150300.15.8.1 | SUSE-SU-2023:0075-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | net-snmp | 5.9.3-150300.15.8.1 | SUSE-SU-2023:0075-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.3 | net-snmp | 5.9.3-150300.15.8.1 | SUSE-SU-2023:0075-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.23 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.22 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.21 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.20 | net-snmp | 5.9.3-r2 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.18 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.17 | net-snmp | 5.9.3-r2 | — |
| Alpine v3.16 | net-snmp | 5.9.3-r1 | — |
| Alpine v3.15 | net-snmp | 5.9.3-r1 | — |
| Alpine v3.14 | net-snmp | 5.9.3-r1 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | net-snmp | 5.9.4-1 | — |
| Azure Linux 2 (CBL-Mariner) | net-snmp | 5.9.4-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | net-snmp +6 | 1:5.9.1-9.0.1.el9 | ELSA-2023-2444 |
| Oracle Linux 8 | net-snmp +5 | 1:5.8-27.0.1.el8 | ELSA-2023-2969 |
Advisories 21
- ALSA-2023:2444 Moderate: net-snmp security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2969 Moderate: net-snmp security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-2031 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- USN-5795-2 net-snmp vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2023:2969 Red Hat Security Advisory: net-snmp security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5795-1 net-snmp vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-3270-1 net-snmp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:0068-1 Security update for net-snmp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0075-1 Security update for net-snmp SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1970 Net-SNMP: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jan 27, 2026
- DLA-4381-1 net-snmp - security update Debian Security (DSA / DLA) · Nov 25, 2025
- RHSA-2023:2444 Red Hat Security Advisory: net-snmp security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2025-0225 Dell PowerProtect Data Domain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 1, 2025
- NCSC-2024-0246 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 11, 2024
- ICSA-24-165-10 Siemens SIMATIC and SIPLUS CISA ICS & IT advisories · Jun 11, 2024
- SSA-625862 SSA-625862: Multiple Vulnerabilities in Third-Party Components in SIMATIC CP 1542SP-1 and CP 1543SP-1 before V2.3 Siemens ProductCERT · Jun 11, 2024
- SSA-099606 SSA-099606: Multiple Vulnerabilities in SIMATIC MV500 before V3.3.5 Siemens ProductCERT · Nov 14, 2023
- ICSA-23-320-13 Siemens SIMATIC MV500 CISA ICS & IT advisories · Nov 14, 2023
- WID-SEC-2023-1969 HPE Fabric OS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Aug 6, 2023
- ELSA-2023-2969 Moderate: net-snmp security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 24, 2023
- ELSA-2023-2444 Moderate: net-snmp security and bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 15, 2023