CVE-2020-17437: An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products
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HIGH 8.2REMOTEUPGRADEUPGRADEUPGRADE
CVE-2020-17437 is a high-severity flaw (CVSS 8.2) affecting uip, open-iscsi, sentron 3va com100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
siemens sentron 3va com100 firmware UPGRADE
Affected: < 4.4.1
Fixed in: 4.4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
siemens sentron 3va com800 firmware UPGRADE
Affected: < 4.4.1
Fixed in: 4.4.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
siemens sentron 3va dsp800 firmware UPGRADE
Affected: < 4.0
Fixed in: 4.0
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
siemens sentron pac2200 clp firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-17437?
uip: upgrade to newer than 1.0; open-iscsi: upgrade to newer than 2.1.7; sentron 3va com100 firmware: upgrade to 4.4.1. Exact commands for each OS are on this page.
Is CVE-2020-17437 being exploited?
CVE-2020-17437 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-17437 affect?
CVE-2020-17437 affects uip, open-iscsi, sentron 3va com100 firmware. Severity is high (CVSS 8.2). 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 byt
How urgent is CVE-2020-17437?
Priority 55/100. High severity; Remotely exploitable, no login, no user action
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