JuniperCVELIST:CVE-2021-31360CVE-2021-31360 Junos OS and Junos OS Evolved: Denial of Service vulnerability in local file processing
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
0.0004 Low
EPSS
Percentile
12.6%
An improper privilege management vulnerability in the Juniper Networks Junos OS and Junos OS Evolved command-line interpreter (CLI) allows a low-privileged user to overwrite local files as root, possibly leading to a system integrity issue or Denial of Service (DoS). Depending on the files overwritten, exploitation of this vulnerability could lead to a sustained Denial of Service (DoS) condition, requiring manual user intervention to recover. Systems are only vulnerable if jdhcpd is running, which can be confirmed via the ‘show system processes’ command. For example: root@host# run show system processes extensive | match dhcp 26537 root -16 0 97568K 13692K RUN 0 0:01 3.71% jdhcpd This issue affects: Juniper Networks Junos OS: All versions, including the following supported releases: 15.1 versions prior to 15.1R7-S10; 17.4 versions prior to 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO; All versions of 21.1-EVO.
CNA Affected
[
{
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "15.1R7-S10",
"status": "affected",
"version": "15.1",
"versionType": "custom"
},
{
"lessThan": "17.4R3-S5",
"status": "affected",
"version": "17.4",
"versionType": "custom"
},
{
"lessThan": "18.3R3-S5",
"status": "affected",
"version": "18.3",
"versionType": "custom"
},
{
"lessThan": "18.4R3-S9",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R3-S6",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S7, 19.2R3-S3",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R2-S6, 19.3R3-S3",
"status": "affected",
"version": "19.3",
"versionType": "custom"
},
{
"lessThan": "19.4R3-S6",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R2-S2, 20.1R3-S1",
"status": "affected",
"version": "20.1",
"versionType": "custom"
},
{
"lessThan": "20.2R3-S2",
"status": "affected",
"version": "20.2",
"versionType": "custom"
},
{
"lessThan": "20.3R3",
"status": "affected",
"version": "20.3",
"versionType": "custom"
},
{
"lessThan": "20.4R2-S1, 20.4R3",
"status": "affected",
"version": "20.4",
"versionType": "custom"
},
{
"lessThan": "21.1R1-S1, 21.1R2",
"status": "affected",
"version": "21.1",
"versionType": "custom"
}
]
},
{
"product": "Junos OS Evolved",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "20.4R2-S3-EVO",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "21.1*",
"status": "affected",
"version": "21.1R1-EVO",
"versionType": "custom"
}
]
}
]References
Related
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
0.0004 Low
EPSS
Percentile
12.6%