Detections
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Juniper Junos OS Vulnerability (JSA11134)
medium Nessus Plugin ID 178667
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Synopsis
The remote device is missing a vendor-supplied security patch.Description
The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11134 advisory.- In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of- Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. This issue does not affect Junos OS versions. (CVE-2021-0239)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Apply the relevant Junos software release referenced in Juniper advisory JSA11134See Also
Plugin Details
Severity: Medium
ID: 178667
File Name: juniper_jsa11134.nasl
Version: 1.0
Type: combined
Family: Junos Local Security Checks
Published: 7/20/2023
Updated: 7/20/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.5
Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2021-0239
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:juniper:junos
Required KB Items: Host/Juniper/JUNOS/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 4/14/2021
Vulnerability Publication Date: 4/14/2021
Reference Information
CVE: CVE-2021-0239
JSA: JSA11134