Description
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.
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 | open-iscsi | 2.1.3-1 | — |
| Debian 13 | open-iscsi | 2.1.3-1 | — |
| Debian 12 | open-iscsi | 2.1.3-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | open-iscsi | 2.0.874-7.1ubuntu6.4 | USN-6259-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | open-iscsi | 2.0.874-5ubuntu2.11+esm1 | USN-6259-1 |
| Ubuntu Pro 16.04 LTS | open-iscsi | 2.0.873+git0.3b4b4500-14ubuntu3.7+esm1 | USN-6259-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLES 15 SP2 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1, SUSE-RU-2021:1517-1 |
| SLES 15 SP1 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLES 15 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLES 12 SP5 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
| SLES 12 SP3 | open-iscsi | 2.0.876-53.34.1 | SUSE-SU-2022:2806-1 |
| SLES 12 SP2 | open-iscsi | 2.0.873-46.17.2 | SUSE-SU-2022:2861-1 |
| SLES for SAP 15 SP1 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLES for SAP 15 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLES for SAP 12 SP5 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
| SLES for SAP 12 SP4 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
| SLE Micro 5.0 | open-iscsi | 2.1.4-22.14.1 | SUSE-RU-2021:1517-1 |
| SLE HPC 15 SP1 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SLE HPC 15 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SUSE OpenStack Cloud Crowbar 9 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
| SUSE OpenStack Cloud 9 | open-iscsi | 2.0.876-12.27.2 | SUSE-SU-2021:0663-1 |
| SUSE Manager Server 4.0 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SUSE Manager Retail Branch Server 4.0 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SUSE Manager Proxy 4.0 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
| SUSE Enterprise Storage 6 | open-iscsi | 2.0.876-13.42.1 | SUSE-SU-2021:1164-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | open-iscsi | 2.1.5-80.2 | openSUSE-SU-2024:11112-1 |
Advisories 11
- USN-6259-1 open-iscsi vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- SUSE-SU-2022:2806-1 Security update for open-iscsi SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11112-1 iscsiuio-0.7.8.6-80.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1164-1 Security update for open-iscsi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2021:1517-1 Recommended update for open-iscsi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0663-1 Security update for open-iscsi SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2861-1 Security update for open-iscsi SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-21-068-06 Siemens TCP/IP Stack Vulnerabilities-AMNESIA:33 in SENTRON PAC / 3VA Devices (Update C) CISA ICS & IT advisories · May 6, 2025
- WID-SEC-2022-1044 TCP/IP Stack: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 27, 2023
- SSA-541018 SSA-541018: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SENTRON PAC / 3VA Devices (Part 2) Siemens ProductCERT · Mar 8, 2022
- ICSA-20-343-01 Multiple Embedded TCP/IP Stacks CISA ICS & IT advisories · Dec 8, 2020