Medium severity · published Aug 17, 2023
CVE-2023-36844
Junos OS: EX Series: A PHP vulnerability in J-Web allows an unauthenticated attacker to control important environment variables
In wildKEV
5.3
CVSS
90%
EPSS
Yes
On KEV
Description
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables.
Using a crafted request an attacker is able to modify
certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities.
This issue affects Juniper Networks Junos OS on EX Series:
* All versions prior to 20.4R3-S9;
* 21.1 versions 21.1R1 and later;
* 21.2 versions prior to 21.2R3-S7;
* 21.3 versions
prior to
21.3R3-S5;
* 21.4 versions
prior to
21.4R3-S5;
* 22.1 versions
prior to
22.1R3-S4;
* 22.2 versions
prior to
22.2R3-S2;
* 22.3 versions
prior to 22.3R3-S1;
* 22.4 versions
prior to
22.4R2-S2, 22.4R3;
* 23.2 versions prior to
23.2R1-S1, 23.2R2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)90.0% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 13, 2023
Federal remediation dueNov 17, 2023
Ransomware campaign useNot known
Affected products
Which versions
JO
Junos OS · Juniper
before 20.4R3-S9; 21.1 before 21.1*; 21.2 before 21.2R3-S6; 21.3 before 21.3R3-S5; 21.4 before 21.4R3-S5; 22.1 before 22.1R3-S4; +4 more · source: vendor, NVD, KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-36844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-36844
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://supportportal.juniper.net/JSA72300
packetstormsecurity.com
http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html
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