UnrealIRCd Webserver Header DoS Vulnerability
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| UnrealIRCd | UnrealIRCd | unaffected |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Unrealircd | Unrealircd |
|
Vendor Solution
Upgrade to UnrealIRCd 6.2.7 or later. Alternatively, apply the hot-patch to fix the issue without restart: ./unrealircd hot-patch webserver-header-dos
Vendor Workaround
Remove the websocket and rpc options from your listen blocks until the patch or upgrade is applied.
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.582% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Title | UnrealIRCd Webserver Header DoS Vulnerability |
| Type | Values Removed | Values Added |
|---|---|---|
| Title | UnrealIRCd Webserver Header Limit Exhaustion Leading to Denial of Service |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Title | UnrealIRCd Webserver Header Limit Exhaustion Leading to Denial of Service |
| Type | Values Removed | Values Added |
|---|---|---|
| Title | UnrealIRCd Webserver Header DoS via Unlimited HTTP Headers |
| Type | Values Removed | Values Added |
|---|---|---|
| Title | UnrealIRCd Webserver Header DoS via Unlimited HTTP Headers |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The webserver in UnrealIRCd 6.0.5 through 6.2.6 before 6.2.7 does not limit the number of HTTP request headers, which allows remote attackers to cause a denial of service (memory consumption and unresponsive server) via an HTTP request with an unlimited number of headers, if a websocket or JSON-RPC listener is enabled (disabled by default). | |
| First Time appeared |
Unrealircd
Unrealircd unrealircd |
|
| Weaknesses | CWE-770 | |
| CPEs | cpe:2.3:a:unrealircd:unrealircd:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Unrealircd
Unrealircd unrealircd |
|
| References |
| |
| Metrics |
cvssV3_1
|