CVE-2020-13987: An issue was discovered in Contiki through 3.0
53
This month
HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE
CVE-2020-13987 is a high-severity flaw (CVSS 7.5) 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 Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
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 pac3200 firmware UPGRADE
Affected: < 2.4.7
Fixed in: 2.4.7
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 pac4200 firmware UPGRADE
Affected: < 2.3.0
Fixed in: 2.3.0
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.
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-2020-13987?
uip: upgrade to newer than 1.0; open-iscsi: upgrade to newer than 2.1.12; sentron 3va com100 firmware: upgrade to 4.4.1. Exact commands for each OS are on this page.
Is CVE-2020-13987 being exploited?
CVE-2020-13987 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-2020-13987 affect?
CVE-2020-13987 affects uip, open-iscsi, sentron 3va com100 firmware. Severity is high (CVSS 7.5). An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
How urgent is CVE-2020-13987?
Priority 53/100. High severity; Remotely exploitable, no login, no user action
PatchTheCVE