CVE-2020-13988

mediumpriority · track · 31stack campaign · AMNESIA:33EPSS 0.040 · 90 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.96% (90th) EPSS

CVSS 5 · medium

Is it mine?

39 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

An issue was discovered in Contiki through 3.0. An Integer Overflow exists in the uIP TCP/IP Stack component when parsing TCP MSS options of IPv4 network packets in uip_process in net/ipv4/uip.c.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSENTRON 3VA COM100/800siemens_psirt
Update to V4.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109765343/
FixedSENTRON 3VA DSP800siemens_psirt
Update to V2.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109761031/
FixedSENTRON PAC2200 (without MID Approval)siemens_psirt
Update to V3.0.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109760897/
FixedSENTRON PAC3200siemens_psirt
Update to V2.4.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/31674577/
FixedSENTRON PAC3200Tsiemens_psirt
Update to V3.0.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109793060/
FixedSENTRON PAC4200siemens_psirt
Update to V2.0.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/35029840/
FixedSIRIUS 3RW5 communication module Modbus TCPsiemens_psirt
Update to V1.1.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109759671/
FixedFNETcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixedNut/Netcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
Fixedopen-iscsicisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixedpicoTCP (EOL)cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixedpicoTCP-NGcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixeduIP (EOL)cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixeduIP-Contiki-NGcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixeduIP-Contiki-OS (end-of-life [EOL])cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
FixedSENTRON 3VA COM100/800cisa_csaf_ot
Update to V4.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109765343/
FixedSENTRON 3VA DSP800cisa_csaf_ot
Update to V2.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109761031/
FixedSENTRON PAC2200 (without MID Approval)cisa_csaf_ot
Update to V3.0.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109760897/
FixedSENTRON PAC3200cisa_csaf_ot
Update to V2.4.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/31674577/
FixedSENTRON PAC3200Tcisa_csaf_ot
Update to V3.0.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109793060/
FixedSENTRON PAC4200cisa_csaf_ot
Update to V2.0.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/35029840/
FixedSIRIUS 3RW5 communication module Modbus TCPcisa_csaf_ot
Update to V1.1.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109759671/
MitigationSENTRON 3VA COM100/800siemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON 3VA DSP800siemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC2200 (without MID Approval)siemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC3200siemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC3200Tsiemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC4200siemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSIRIUS 3RW5 communication module Modbus TCPsiemens_psirt
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON 3VA COM100/800cisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON 3VA DSP800cisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC2200 (without MID Approval)cisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC3200cisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC3200Tcisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSENTRON PAC4200cisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.
MitigationSIRIUS 3RW5 communication module Modbus TCPcisa_csaf_ot
For successful exploitation, an attacking system must be located in the same Modbus TCP segment as a vulnerable device. Therefore ensure that only trusted systems are attached to that segment and only trusted persons have access.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.16.5mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190USprimaryCWE-190USCWE-190USCWE-190US

affected products (39)

Products and version ranges known to be affected.

Open Source TCP/IP Stackall versionscert_bundDEcpe:/a:open_source:tcpip_stack:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Unify OpenScape 4000all versionscert_bundDEcpe:/h:unify:openscape_4000:-
Unify OpenScape Alarm Responseall versionscert_bundDEcpe:/h:unify:openscape_alarm_response:-
Unify OpenScape Businessall versionscert_bundDEcpe:/a:unify:openscape_business:-
Unify OpenScape Common Management Platformall versionscert_bundDEcpe:/a:unify:openscape_common_management_platform:-
Unify OpenScape Cordless IPall versionscert_bundDEcpe:/a:unify:openscape_cordless_ip:-
Unify OpenScape Desk Phoneall versionscert_bundDEcpe:/h:unify:openscape_deskphone:-
Unify OpenScape Xpertall versionscert_bundDEcpe:/h:unify:openscape_xpert:-
SENTRON 3VA COM100/800all versionscisa_csaf_otUS
SENTRON 3VA DSP800all versionscisa_csaf_otUS
SENTRON PAC2200 (without MID Approval)all versionscisa_csaf_otUS
SENTRON PAC3200all versionscisa_csaf_otUS
SENTRON PAC3200Tall versionscisa_csaf_otUS
SENTRON PAC4200all versionscisa_csaf_otUS
SIRIUS 3RW5 communication module Modbus TCPall versionscisa_csaf_otUS
Siemens SENTRON 3VA COM100/800< V4.2cisa_csaf_otUS
Siemens SENTRON 3VA DSP800< V2.0cisa_csaf_otUS
Siemens SENTRON PAC2200 (without MID Approval)< V3.0.5cisa_csaf_otUS

showing 20 of 39

advisories (4)

Vendor and ecosystem advisories describing this.

SSA-541017SSA-541017: Embedded TCP/IP Stack Vulnerabilities (AMNESIA:33) in SIRIUS 3RW5 Modbus TCP and SENTRON PAC / 3VA Devices2020-12-08csaf · siemens_psirtDE
Security researchers discovered and disclosed 33 vulnerabilities in several open-source TCP/IP stacks for embedded devices, also known as "AMNESIA:33" vulnerabilities. This advisory describes the impact of one of these vulnerabilities (CVE-2020-13988) to Siemens products. Siemens has released updates for the affected products and recommends to update to the latest versions. The impact of additional "AMNESIA:33" vulnerabilities is described in Siemens Security Advisory SSA-541018.
WID-SEC-W-2022-1044TCP/IP Stack: Mehrere SchwachstellenDeutsch2020-12-08csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in TCP/IP Stack ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, einen Denial of Service Angriff durchzuführen, vertrauliche Daten einzusehen oder Daten zu manipulieren.
ICSA-20-343-01Multiple Embedded TCP/IP Stacks2020-12-08icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow attackers to corrupt memory, put devices into infinite loops, access unauthorized data, and/or poison DNS cache.
ICSA-20-343-05Siemens Embedded TCP/IP Stack Vulnerabilities-AMNESIA:33 (Update C)2020-12-08icsa · cisa_csaf_otUS
Security researchers discovered and disclosed 33 vulnerabilities in several open-source TCP/IP stacks for embedded devices, also known as "AMNESIA:33" vulnerabilities. This advisory describes the impact of one of these vulnerabilities (CVE-2020-13988) to Siemens products. Siemens has released updates for the affected products and recommends to update to the latest versions. The impact of additional "AMNESIA:33" vulnerabilities is described in Siemens Security Advisory SSA-541018.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisa_csaf_ot siemens_psirt NVD CVE.org MITRE

published 2020-12-11modified 2026-06-17

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+4648 more

references (15)

External citations — patches, advisories, analysis.

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