Description
libESMTP through 1.0.6 mishandles domain copying into a fixed-size buffer in ntlm_build_type_2 in ntlm/ntlmstruct.c, as demonstrated by a stack-based buffer over-read.
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 | libesmtp | No fix yet | — |
| Debian 13 | libesmtp | No fix yet | — |
| Debian 12 | libesmtp | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES 15 SP2 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES 15 SP1 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES 15 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES 12 SP5 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
Show 23 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLES 12 SP3 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLES 12 SP2 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLES 11 SP4 | libesmtp | 1.0.4-157.18.3.1 | SUSE-SU-2021:14793-1 |
| SLES for SAP 15 SP1 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES for SAP 15 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLES for SAP 12 SP5 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLES for SAP 12 SP4 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLES for SAP 12 SP3 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SLE Micro 5.1 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-2 |
| SLE Micro 5.0 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLE HPC 15 SP1 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SLE HPC 15 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SUSE OpenStack Cloud Crowbar 9 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SUSE OpenStack Cloud Crowbar 8 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SUSE OpenStack Cloud 9 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SUSE OpenStack Cloud 8 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SUSE Manager Server 4.0 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SUSE Manager Retail Branch Server 4.0 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SUSE Manager Proxy 4.0 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | libesmtp | 1.0.4-157.18.3.1 | SUSE-SU-2021:14793-1 |
| SUSE HPE Helion OpenStack 8 | libesmtp | 1.0.6-17.3.1 | SUSE-SU-2021:2917-1 |
| SUSE Enterprise Storage 6 | libesmtp | 1.0.6-150.4.1 | SUSE-SU-2021:2937-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libesmtp | 1.1.0-1.1 | openSUSE-SU-2024:12594-1 |
| openSUSE Leap 15.3 | libesmtp | 1.0.6-150.4.1 | openSUSE-SU-2021:2937-1 |
| openSUSE Leap 15.2 | libesmtp | 1.0.6-lp152.4.3.1 | openSUSE-SU-2021:1235-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libesmtp | 1.0.6-21 | — |
| Azure Linux 2 (CBL-Mariner) | libesmtp | 1.0.6-21 | — |
Advisories 7
- openSUSE-SU-2024:12594-1 libesmtp-devel-1.1.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14793-1 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2937-2 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1235-1 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2937-1 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2917-1 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2937-1 Security update for libesmtp SUSE / openSUSE Security Updates · Feb 4, 2026