CVE-2021-0249: Junos OS: SRX Series: A remote attacker may be able to cause a PFE buffer overflow to arbitrarily remotely execute code or commands on the target device with UTM enabled.
On SRX Series devices configured with UTM services a buffer overflow vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS may allow an attacker to arbitrarily execute code or commands on the target to take over or otherwise impact the device by sending crafted packets to or through the device. This issue affects: Juniper Networks Junos OS on SRX Series: 15.1X49 versions prior to 15.1X49-D190; 17.4 versions prior to 17.4R2-S9; 17.4R3 and later versions prior to 18.1R3-S9; 18.2 versions prior to 18.2R3-S1; 18.3 versions prior to 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S4, 19.1R2; 19.2 versions prior to 19.2R1-S1, 19.2R2. An indicator of compromise can be the following text in the UTM log: RTUTM: AVFILENOTSCANNEDPASSEDMT:
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Frequently Asked Questions
What is the severity of CVE-2021-0249?
The severity of CVE-2021-0249 is categorized as high, due to its potential for remote code execution.
How do I fix CVE-2021-0249?
To fix CVE-2021-0249, update your Junos OS to the latest recommended version as specified in Juniper's security advisories.
Which Juniper devices are affected by CVE-2021-0249?
CVE-2021-0249 affects multiple Juniper SRX Series models running specific versions of Junos OS that have UTM services enabled.
What potential impact does CVE-2021-0249 have on Juniper devices?
CVE-2021-0249 may allow an attacker to execute arbitrary code, potentially leading to unauthorized control of the affected device.
Is there a known exploit for CVE-2021-0249?
As of now, there are no publicly available exploit details for CVE-2021-0249, but the vulnerability poses a significant risk.