Campfire vulnerable to SSRF via incomplete private-network denylist in the link-unfurl guard

Özet

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Campfire is a web-based chat application. In version 1.4.4 and earlier, when a Campfire message contains a link, the server fetches it to build an OpenGraph unfurl preview. RestrictedHTTP::PrivateNetworkGuard relied on Ruby's IPAddr#private?  IPAddr#loopback?, and IPAddr#link_local? predicates plus IPv4-mapped and IPv4-compatible checks, which do not cover several special-use ranges. An authenticated user can post a link to a hostname resolving to CGNAT 100.64.0.0/10, NAT64 64:ff9b::/96 or 64:ff9b:1::/48, or 6to4 2002::/16 to bypass the guard and cause server-side requests to internal network resources. The NAT64 and 6to4 ranges can embed an internal IPv4 target. Confidentiality impact is limited to returned OpenGraph metadata, and most internal endpoints return none. There is no integrity or availability impact. An initial fix was released in version 1.4.5.

Etkilenen sürümler1 yazılım

Kaynaklar6 kaynak

• CVE.org kaydı
• NVD kaydı
• github.com/…mpfire/security/advisories/GHSA-gjm7-g266-w3wj Diğer
• github.com/basecamp/once-campfire/pull/225 Diğer
• github.com/…ommit/69e8cd788593cf421c32626a5273c0b449ceee9b Diğer
• github.com/basecamp/once-campfire/releases/tag/v1.4.5 Diğer

Kayıt geçmişi

1. 30 Eki 2026 17:10Yayımlandı

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