Lemmy: Rate limit bypass via X-Forwarded-For header spoofing in actix-web ConnectionInfo
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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| LemmyNet | lemmy | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||||||
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| Lemmynet | Lemmy |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.559% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Lemmynet
Lemmynet lemmy |
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| Vendors & Products |
Lemmynet
Lemmynet lemmy |
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| Description | Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-beta.1, actix-web ConnectionInfo::realip_remote_addr reads the first value of X-Forwarded-For as the client address used by raw_ip_key in crates/utils/src/rate_limit/mod.rs. Lemmy's bundled docker/nginx.conf uses $proxy_add_x_forwarded_for instead of $remote_addr, which appends the real client address to an X-Forwarded-For value supplied by the client. An unauthenticated attacker can therefore place a different spoofed address first on each request and receive a new rate-limit bucket, bypassing limits on POST /api/v4/account/auth/register, POST /api/v4/account/auth/login, POST /api/v4/post, POST /api/v4/comment, GET /api/v4/search, POST /api/v4/image, and POST /api/v4/account/import_settings. This permits excessive account creation, brute-force attempts, spam, scraping, uploads, and repeated imports. This issue is fixed in versions 0.19.19 and 1.0.0-beta.1. | |
| Title | Lemmy: Rate limit bypass via X-Forwarded-For header spoofing in actix-web ConnectionInfo | |
| Weaknesses | CWE-799 | |
| References |
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| Metrics |
cvssV3_1
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