Paper/Archive/CVE-2021-0249

CVE-2021-0249

Juniper Networks Junos OS — 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.

Description · from the CVE record

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: RT_UTM: AV_FILE_NOT_SCANNED_PASSED_MT:

Affected

ProductAffectedFixed inSource
Junos OS15.1X49 – < 15.1X49-D19015.1X49-D190CNA
Junos OS17.4 – < 17.4R2-S917.4R2-S9CNA
Junos OS18.1 – < 18.1R3-S918.1R3-S9CNA
Junos OS18.2 – < 18.2R3-S118.2R3-S1CNA
Junos OS18.3 – < 18.3R2-S3, 18.3R318.3R2-S3, 18.3R3CNA
Junos OS18.4 – < 18.4R2-S3, 18.4R318.4R2-S3, 18.4R3CNA
Junos OS19.1 – < 19.1R1-S4, 19.1R219.1R1-S4, 19.1R2CNA
Junos OS19.2 – < 19.2R1-S1, 19.2R219.2R1-S1, 19.2R2CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
juniper (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refkb.juniper.net/JSA11142