CVE-2021-0261
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Junos OS: Denial of Service vulnerability in J-Web and web based (HTTP/HTTPS) services caused by a high number of specific requests
A vulnerability in the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through with Web-Redirect, and Captive Portal allows an unauthenticated attacker to cause an extended Denial of Service (DoS) for these services by sending a high number of specific requests. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S17 on EX Series; 12.3X48 versions prior to 12.3X48-D105 on SRX Series; 15.1 versions prior to 15.1R7-S8; 15.1X49 versions prior to 15.1X49-D230 on SRX Series; 16.1 versions prior to 16.1R7-S8; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; 20.2 versions prior to 20.2R1-S1, 20.2R2.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- EX Series
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 12.3 | affected | custom | 12.3R12-S17 | Unavailable | None listed |
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- SRX Series
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 12.3X48 | affected | custom | 12.3X48-D105 | Unavailable | None listed |
| 15.1X49 | affected | custom | 15.1X49-D230 | Unavailable | None listed |
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 15.1 | affected | custom | 15.1R7-S8 | Unavailable | None listed |
| 16.1 | affected | custom | 16.1R7-S8 | Unavailable | None listed |
| 17.4 | affected | custom | 17.4R2-S12, 17.4R3-S3 | Unavailable | None listed |
| 18.1 | affected | custom | 18.1R3-S11 | Unavailable | None listed |
| 18.2 | affected | custom | 18.2R3-S6 | Unavailable | None listed |
| 18.3 | affected | custom | 18.3R2-S4, 18.3R3-S3 | Unavailable | None listed |
| 18.4 | affected | custom | 18.4R2-S5, 18.4R3-S4 | Unavailable | None listed |
| 19.1 | affected | custom | 19.1R2-S2, 19.1R3-S2 | Unavailable | None listed |
| 19.2 | affected | custom | 19.2R1-S5, 19.2R3 | Unavailable | None listed |
| 19.3 | affected | custom | 19.3R2-S4, 19.3R3 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R1-S3, 19.4R2-S2, 19.4R3 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R1-S3, 20.1R2 | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R1-S1, 20.2R2 | Unavailable | None listed |