Description
When libpsl support is enabled, libcurl fails to enforce the Public Suffix List boundary check when processing a `Set-Cookie` header where the `Domain` attribute explicitly matches an origin host that is itself a public suffix (e.g., `Domain=co.uk` set by `co.uk`). Instead of coercing it into a strict host-only cookie, libcurl saves the cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is inappropriately included in subsequent outbound requests or HTTP redirects to arbitrary sibling subdomains under the same public suffix (e.g., `attacker.co.uk`).
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Affected products
- curl / curle77b5b7453c1e8ccd7ec0816890d98e2f392e465 – 95c1e8915dce64606bd753fd47fc0bd236e31cd6
- curl / curl8.20.0 – 8.20.0
- curl / curl8.19.0 – 8.19.0
- curl / curl8.18.0 – 8.18.0
- curl / curl8.17.0 – 8.17.0
- curl / curl8.16.0 – 8.16.0
- curl / curl8.15.0 – 8.15.0
- curl / curl8.14.1 – 8.14.1
- curl / curl8.14.0 – 8.14.0
- curl / curl8.13.0 – 8.13.0
- curl / curl8.12.1 – 8.12.1
- curl / curl8.12.0 – 8.12.0
- curl / curl8.11.1 – 8.11.1
- curl / curl8.11.0 – 8.11.0
- curl / curl8.10.1 – 8.10.1
- curl / curl8.10.0 – 8.10.0
- curl / curl8.9.1 – 8.9.1
- curl / curl8.9.0 – 8.9.0
- curl / curl8.8.0 – 8.8.0
- curl / curl8.7.1 – 8.7.1
- curl / curl8.7.0 – 8.7.0
- curl / curl8.6.0 – 8.6.0
- curl / curl8.5.0 – 8.5.0
- curl / curl8.4.0 – 8.4.0
- curl / curl8.3.0 – 8.3.0
- curl / curl8.2.1 – 8.2.1
- curl / curl8.2.0 – 8.2.0
- curl / curl8.1.2 – 8.1.2
- curl / curl8.1.1 – 8.1.1
- curl / curl8.1.0 – 8.1.0
- curl / curl8.0.1 – 8.0.1
- curl / curl8.0.0 – 8.0.0
- curl / curl7.88.1 – 7.88.1
- curl / curl7.88.0 – 7.88.0
- curl / curl7.87.0 – 7.87.0
- curl / curl7.86.0 – 7.86.0
- curl / curl7.85.0 – 7.85.0
- curl / curl7.84.0 – 7.84.0
- curl / curl7.83.1 – 7.83.1
- curl / curl7.83.0 – 7.83.0
- curl / curl7.82.0 – 7.82.0
- curl / curl7.81.0 – 7.81.0
- curl / curl7.80.0 – 7.80.0
- curl / curl7.79.1 – 7.79.1
- curl / curl7.79.0 – 7.79.0
- curl / curl7.78.0 – 7.78.0
- curl / curl7.77.0 – 7.77.0
- curl / curl7.76.1 – 7.76.1
- curl / curl7.76.0 – 7.76.0
- curl / curl7.75.0 – 7.75.0
- curl / curl7.74.0 – 7.74.0
- curl / curl7.73.0 – 7.73.0
- curl / curl7.72.0 – 7.72.0
- curl / curl7.71.1 – 7.71.1
- curl / curl7.71.0 – 7.71.0
- curl / curl7.70.0 – 7.70.0
- curl / curl7.69.1 – 7.69.1
- curl / curl7.69.0 – 7.69.0
- curl / curl7.68.0 – 7.68.0
- curl / curl7.67.0 – 7.67.0
- curl / curl7.66.0 – 7.66.0
- curl / curl7.65.3 – 7.65.3
- curl / curl7.65.2 – 7.65.2
- curl / curl7.65.1 – 7.65.1
- curl / curl7.65.0 – 7.65.0
- curl / curl7.64.1 – 7.64.1
- curl / curl7.64.0 – 7.64.0
- curl / curl7.63.0 – 7.63.0
- curl / curl7.62.0 – 7.62.0
- curl / curl7.61.1 – 7.61.1
- curl / curl7.61.0 – 7.61.0
- curl / curl7.60.0 – 7.60.0
- curl / curl7.59.0 – 7.59.0
- curl / curl7.58.0 – 7.58.0
- curl / curl7.57.0 – 7.57.0
- curl / curl7.56.1 – 7.56.1
- curl / curl7.56.0 – 7.56.0
- curl / curl7.55.1 – 7.55.1
- curl / curl7.55.0 – 7.55.0
- curl / curl7.54.1 – 7.54.1
- curl / curl7.54.0 – 7.54.0
- curl / curl7.53.1 – 7.53.1
- curl / curl7.53.0 – 7.53.0
- curl / curl7.52.1 – 7.52.1
- curl / curl7.52.0 – 7.52.0
- curl / curl7.51.0 – 7.51.0
- curl / curl7.50.3 – 7.50.3
- curl / curl7.50.2 – 7.50.2
- curl / curl7.50.1 – 7.50.1
- curl / curl7.50.0 – 7.50.0
- curl / curl7.49.1 – 7.49.1
- curl / curl7.49.0 – 7.49.0
- curl / curl7.48.0 – 7.48.0
- curl / curl7.47.1 – 7.47.1
- curl / curl7.47.0 – 7.47.0
- curl / curl7.46.0 – 7.46.0
- curl / curl8.21.0 – 8.21.0
- curl / curl7.46.0 – 8.14.2
- curl / curl8.15.0 – 8.16.1
- curl / curl8.17.0 – 8.20.1
- curl / curl8.21.0 – 8.22.0
- haxx / curl7.46.0 – 8.22.0
Updated 15m ago · 8 sources