JuniperCVELIST:CVE-2021-0293CVE-2021-0293 Junos OS: Out-of-memory condition and crashes can occur after executing a certain CLI command repeatedly
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.0004 Low
EPSS
Percentile
12.7%
A vulnerability in Juniper Networks Junos OS caused by Missing Release of Memory after Effective Lifetime leads to a memory leak each time the CLI command ‘show system connections extensive’ is executed. The amount of memory leaked on each execution depends on the number of TCP connections from and to the system. Repeated execution will cause more memory to leak and eventually daemons that need to allocate additionally memory and ultimately the kernel to crash, which will result in traffic loss. Continued execution of this command will cause a sustained Denial of Service (DoS) condition. An administrator can use the following CLI command to monitor for increase in memory consumption of the netstat process, if it exists: user@junos> show system processes extensive | match “username|netstat” PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND 21181 root 100 0 5458M 4913M CPU3 2 0:59 97.27% netstat The following log message might be observed if this issue happens: kernel: %KERN-3: pid 21181 (netstat), uid 0, was killed: out of swap space This issue affects Juniper Networks Junos OS 18.2 versions prior to 18.2R2-S8, 18.2R3-S7. 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S7; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S1; 19.4 versions prior to 19.4R1-S4, 19.4R2-S3, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S1, 20.3R2; This issue does not affect Juniper Networks Junos OS versions prior to 18.2R1.
CNA Affected
[
{
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "18.2R1",
"status": "unaffected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "18.3R3-S4",
"status": "affected",
"version": "18.3",
"versionType": "custom"
},
{
"lessThan": "18.4R1-S8, 18.4R2-S6, 18.4R3-S7",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R1-S6, 19.1R2-S2, 19.1R3-S4",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S6, 19.2R3-S2",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R2-S6, 19.3R3-S1",
"status": "affected",
"version": "19.3",
"versionType": "custom"
},
{
"lessThan": "19.4R1-S4, 19.4R2-S3, 19.4R3-S1",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R2",
"status": "affected",
"version": "20.1",
"versionType": "custom"
},
{
"lessThan": "20.2R2-S1, 20.2R3",
"status": "affected",
"version": "20.2",
"versionType": "custom"
},
{
"lessThan": "20.3R1-S1, 20.3R2",
"status": "affected",
"version": "20.3",
"versionType": "custom"
},
{
"lessThan": "18.2R2-S8, 18.2R3-S7",
"status": "affected",
"version": "18.2",
"versionType": "custom"
}
]
}
]References
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.0004 Low
EPSS
Percentile
12.7%