CVE-2021-0268

CVSS V2 Medium 5.8 CVSS V3 Critical 9.3
Description
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') weakness in J-web of Juniper Networks Junos OS leads to buffer overflows, segment faults, or other impacts, which allows an attacker to modify the integrity of the device and exfiltration information from the device without authentication. The weakness can be exploited to facilitate cross-site scripting (XSS), cookie manipulation (modifying session cookies, stealing cookies) and more. This weakness can also be exploited by directing a user to a seemingly legitimate link from the affected site. The attacker requires no special access or permissions to the device to carry out such attacks. This issue affects: Juniper Networks Junos OS: 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S3; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 18.1R1.
Overview
  • CVE ID
  • CVE-2021-0268
  • Assigner
  • sirt@juniper.net
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-22T20:15:09
  • Last Modified Date
  • 2022-08-05T17:14:19
Weakness Enumerations
CWE URL
CWE-74 http://cwe.mitre.org/data/definitions/74.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s10:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s8:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.1:r3-s9:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1:-:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r2-s7:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.2:r3-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r1-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.3:r3-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r1-s7:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r1-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.3:r2-s5:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:* 1 OR
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • CHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 9.3
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.8
References
Reference URL Reference Tags
https://kb.juniper.net/JSA11159 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-0268
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0268
History
Created Old Value New Value Data Type Notes
2022-05-10 07:13:53 Added to TrackCVE
2022-12-06 02:22:19 2021-04-22T20:15Z 2021-04-22T20:15:09 CVE Published Date updated
2022-12-06 02:22:19 2022-08-05T17:14:19 CVE Modified Date updated
2022-12-06 02:22:19 Analyzed Vulnerability Status updated