Products
RestSharp
- 112.0.0
Source
security-advisories@github.com
Tags
CVE-2024-45302 details
Last Modified : Aug. 29, 2024, 10:15 p.m.
Description
RestSharp is a Simple REST and HTTP API Client for .NET. The second argument to `RestRequest.AddHeader` (the header value) is vulnerable to CRLF injection. The same applies to `RestRequest.AddOrUpdateHeader` and `RestClient.AddDefaultHeader`. The way HTTP headers are added to a request is via the `HttpHeaders.TryAddWithoutValidation` method which does not check for CRLF characters in the header value. This means that any headers from a `RestSharp.RequestHeaders` object are added to the request in such a way that they are vulnerable to CRLF-injection. In general, CRLF-injection into a HTTP header (when using HTTP/1.1) means that one can inject additional HTTP headers or smuggle whole HTTP requests. If an application using the RestSharp library passes a user-controllable value through to a header, then that application becomes vulnerable to CRLF-injection. This is not necessarily a security issue for a command line application like the one above, but if such code were present in a web application then it becomes vulnerable to request splitting (as shown in the PoC) and thus Server Side Request Forgery. Strictly speaking this is a potential vulnerability in applications using RestSharp, not in RestSharp itself, but I would argue that at the very least there needs to be a warning about this behaviour in the RestSharp documentation. RestSharp has addressed this issue in version 112.0.0. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CVSS Score
1 | 2 | 3 | 4 | 5 | 6.1 | 7 | 8 | 9 | 10 |
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Weakness
Weakness | Name | Description |
---|---|---|
CWE-93 | Improper Neutralization of CRLF Sequences ('CRLF Injection') | The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. |
CVSS Data
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Base Score
6.1
Exploitability Score
1.8
Impact Score
4.2
Base Severity
MEDIUM
Vector String : CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
URL | Source |
---|---|
https://github.com/restsharp/RestSharp/blob/777bf194ec2d14271e7807cc704e73ec18fcaf7e/src/RestSharp/Request/HttpRequestMessageExtensions.cs#L32 | security-advisories@github.com |
https://github.com/restsharp/RestSharp/commit/0fba5e727d241b1867bd71efc912594075c2934b | security-advisories@github.com |
https://github.com/restsharp/RestSharp/security/advisories/GHSA-4rr6-2v9v-wcpc | security-advisories@github.com |