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CVE-2020-13988

An issue was discovered in Contiki through 3.0. An Integer Overflow exists in the uIP TCP/IP...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

3.96%Up 3.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2020-13988
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-190
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-13988
Updated
2026-11-02
EUVDEUVD-2020-6158 No score

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.

Record
EUVD-2020-6158
Updated
2026-11-03
GitHub AdvisoriesGHSA-cx9v-96cj-78q9 No score

An issue was discovered in Contiki through 3.0. An Integer Overflow exists in the uIP TCP/IP...

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.

Record
GHSA-cx9v-96cj-78q9
Weakness
CWE-190
Updated
2026-11-02
OSV 7.5

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.

Record
CVE-2020-13988
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-13988 7.5

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.

Record
DEBIAN-CVE-2020-13988
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVUBUNTU-CVE-2020-13988 7.5

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.

Record
UBUNTU-CVE-2020-13988
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11112-1 No score

iscsiuio-0.7.8.6-80.2 on GA media

These are all security issues fixed in the iscsiuio-0.7.8.6-80.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11112-1
Updated
2026-11-02
OSVSUSE-RU-2021:1517-1 No score

Recommended update for open-iscsi

This update for open-iscsi fixes the following issues:

  • Enabled asynchronous logins for iscsi.service (bsc#1183421)
  • Fixed a login issue when target is delayed
Record
SUSE-RU-2021:1517-1
Updated
2026-11-02
OSVSUSE-SU-2021:0663-1 No score

Security update for open-iscsi

This update for open-iscsi fixes the following issues:

Fixes for CVE-2019-17437, CVE-2020-17438, CVE-2020-13987 and CVE-2020-13988 (bsc#1179908):

  • check for TCP urgent pointer past end of frame
  • check for u8 overflow when processing TCP options
  • check for header length underflow during checksum calculation
Record
SUSE-SU-2021:0663-1
Updated
2026-11-02
OSVSUSE-SU-2021:1164-1 No score

Security update for open-iscsi

This update for open-iscsi fixes the following issues:

  • CVE-2020-17437: uIP Out-of-Bounds Write (bsc#1179908)
  • CVE-2020-17438: uIP Out-of-Bounds Write (bsc#1179908)
  • CVE-2020-13987: uIP Out-of-Bounds Read (bsc#1179908)
  • CVE-2020-13988: uIP Integer Overflow (bsc#1179908)
  • Enabled no-wait ('-W') iscsiadm option for iscsi login service (bsc#1173886, bsc#1183421)
  • Added the ability to perform async logins (bsc#1173886)
Record
SUSE-SU-2021:1164-1
Updated
2026-11-02
OSVSUSE-SU-2022:2806-1 No score

Security update for open-iscsi

This update for open-iscsi fixes the following issues:

Fixed various vulnerabilities in the embedded TCP/IP stack (bsc#1179908):

  • CVE-2020-13987: Fixed an out of bounds memory access when calculating the checksums for IP packets.
  • CVE-2020-13988: Fixed an integer overflow when parsing TCP MSS options of IPv4 network packets.
  • CVE-2020-17437: Fixed an out of bounds memory access when the TCP urgent flag is set.
Record
SUSE-SU-2022:2806-1
Updated
2026-11-02
OSVUSN-6259-1 No score

open-iscsi vulnerabilities

Jos Wetzels, Stanislav Dashevskyi, and Amine Amri discovered that Open-iSCSI incorrectly handled certain checksums for IP packets. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-13987)

Jos Wetzels, Stanislav Dashevskyi, Amine Amri discovered that Open-iSCSI incorrectly handled certain parsing TCP MSS options. An attacker could possibly use this issue to cause a crash or cause unexpected behavior. (CVE-2020-13988)

Amine Amri and Stanislav Dashevskyi discovered that Open-iSCSI incorrectly handled certain TCP data. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-17437)

Record
USN-6259-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
open-iscsi
Debian:12
 before 2.1.3-1
2.1.3-1
open-iscsi
Debian:13
 before 2.1.3-1
2.1.3-1
open-iscsi
Debian:14
 before 2.1.3-1
2.1.3-1
open-iscsi
SUSE:Linux Enterprise Module for Basesystem 15 SP2
From an advisory covering 4 CVEs
 before 2.1.4-22.14.1
2.1.4-22.14.1
open-iscsi
SUSE:Linux Enterprise Micro 5.0
From an advisory covering 4 CVEs
 before 2.1.4-22.14.1
2.1.4-22.14.1
open-iscsi
SUSE:OpenStack Cloud 9
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
open-iscsi
SUSE:OpenStack Cloud Crowbar 9
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
open-iscsi
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
open-iscsi
SUSE:Linux Enterprise Server 12 SP4-LTSS
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
open-iscsi
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
Show 24 moreShow less
Affected packages
PackageAffectedFixed
open-iscsi
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 4 CVEs
 before 2.0.876-12.27.2
2.0.876-12.27.2
open-iscsi
SUSE:Linux Enterprise Module for Legacy 15 SP2
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Module for Legacy 15 SP3
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise High Performance Computing 15-LTSS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server 15-LTSS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server 15 SP1-BCL
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server for SAP Applications 15
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Manager Proxy 4.0
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Manager Retail Branch Server 4.0
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Manager Server 4.0
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Enterprise Storage 6
From an advisory covering 4 CVEs
 before 2.0.876-13.42.1
2.0.876-13.42.1
open-iscsi
SUSE:Linux Enterprise Server 12 SP3-BCL
From an advisory covering 3 CVEs
 before 2.0.876-53.34.1
2.0.876-53.34.1
open-iscsi
Ubuntu:Pro:16.04:LTS
 before 2.0.873+git0.3b4b4500-14ubuntu3.7+esm1, plus listed versions
2.0.873-3ubuntu132.0.873+git0.3b4b4500-13ubuntu32.0.873+git0.3b4b4500-14ubuntu12.0.873+git0.3b4b4500-14ubuntu32.0.873+git0.3b4b4500-14ubuntu3.1
Show 6 moreShow less
2.0.873+git0.3b4b4500-14ubuntu3.22.0.873+git0.3b4b4500-14ubuntu3.32.0.873+git0.3b4b4500-14ubuntu3.42.0.873+git0.3b4b4500-14ubuntu3.52.0.873+git0.3b4b4500-14ubuntu3.62.0.873+git0.3b4b4500-14ubuntu3.7
2.0.873+git0.3b4b4500-14ubuntu3.7+esm1
open-iscsi
Ubuntu:Pro:18.04:LTS
 before 2.0.874-5ubuntu2.11+esm1, plus listed versions
2.0.874-4ubuntu32.0.874-4ubuntu42.0.874-4ubuntu52.0.874-5ubuntu12.0.874-5ubuntu2
Show 9 moreShow less
2.0.874-5ubuntu2.12.0.874-5ubuntu2.22.0.874-5ubuntu2.32.0.874-5ubuntu2.42.0.874-5ubuntu2.62.0.874-5ubuntu2.72.0.874-5ubuntu2.92.0.874-5ubuntu2.102.0.874-5ubuntu2.11
2.0.874-5ubuntu2.11+esm1
open-iscsi
Ubuntu:20.04:LTS
 before 2.0.874-7.1ubuntu6.4, plus listed versions
2.0.874-7.1ubuntu32.0.874-7.1ubuntu52.0.874-7.1ubuntu62.0.874-7.1ubuntu6.12.0.874-7.1ubuntu6.22.0.874-7.1ubuntu6.3
2.0.874-7.1ubuntu6.4
open-iscsi
Ubuntu:Pro:16.04:LTS
From an advisory covering 3 CVEs
 before 2.0.873+git0.3b4b4500-14ubuntu3.7+esm1, plus listed versions
2.0.873-3ubuntu132.0.873+git0.3b4b4500-13ubuntu32.0.873+git0.3b4b4500-14ubuntu12.0.873+git0.3b4b4500-14ubuntu32.0.873+git0.3b4b4500-14ubuntu3.1
Show 6 moreShow less
2.0.873+git0.3b4b4500-14ubuntu3.22.0.873+git0.3b4b4500-14ubuntu3.32.0.873+git0.3b4b4500-14ubuntu3.42.0.873+git0.3b4b4500-14ubuntu3.52.0.873+git0.3b4b4500-14ubuntu3.62.0.873+git0.3b4b4500-14ubuntu3.7
2.0.873+git0.3b4b4500-14ubuntu3.7+esm1
open-iscsi
Ubuntu:Pro:18.04:LTS
From an advisory covering 3 CVEs
 before 2.0.874-5ubuntu2.11+esm1, plus listed versions
2.0.874-4ubuntu32.0.874-4ubuntu42.0.874-4ubuntu52.0.874-5ubuntu12.0.874-5ubuntu2
Show 9 moreShow less
2.0.874-5ubuntu2.12.0.874-5ubuntu2.22.0.874-5ubuntu2.32.0.874-5ubuntu2.42.0.874-5ubuntu2.62.0.874-5ubuntu2.72.0.874-5ubuntu2.92.0.874-5ubuntu2.102.0.874-5ubuntu2.11
2.0.874-5ubuntu2.11+esm1
open-iscsi
Ubuntu:20.04:LTS
From an advisory covering 3 CVEs
 before 2.0.874-7.1ubuntu6.4, plus listed versions
2.0.874-7.1ubuntu32.0.874-7.1ubuntu52.0.874-7.1ubuntu62.0.874-7.1ubuntu6.12.0.874-7.1ubuntu6.22.0.874-7.1ubuntu6.3
2.0.874-7.1ubuntu6.4
open-iscsi
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 2.1.5-80.2
2.1.5-80.2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-13988 is a high vulnerability (CVSS 7.5) in Contiki-ng, published December 1, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.96%, the 90th percentile. Fixed in open-iscsi 2.1.3-1.

References

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