Vendor
curl
98 known vulnerabilities.
Products
98 results · Feed
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Medium 5.9
HSTS subdomain overwrites parent cache entry
When curl is asked to use HSTS, the expiry time for a subdomain might overwrite a parent domain's cache entry, making it end sooner or later than otherwise intended. This affects curl using applications that enable HSTS and use URLs with the insecure `HTTP://…
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Medium 6.5
OCSP stapling bypass with GnuTLS
When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the ret…
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Medium 6.3CVE-2024-7264 EPSS 20%
ASN.1 date parser overread
libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time field. If given an syntactically incorrect field, the parser might end up using -1 for the length of the *time fraction*, leading to a `strlen()` getting per…
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Low 3.1
macidn punycode buffer overread
libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to us…
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High 7.5
freeing stack buffer in utf8asn1str
libcurl's ASN1 parser has this utf8asn1str() function used for parsing an ASN.1 UTF-8 string. Itcan detect an invalid field and return error. Unfortunately, when doing so it also invokes `free()` on a 4 byte localstack buffer. Most modern malloc implementatio…
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Medium 6.5
TLS certificate check bypass with mbedTLS
libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore…
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Medium 6.3
QUIC certificate check bypass with wolfSSL
libcurl skips the certificate verification for a QUIC connection under certain conditions, when built to use wolfSSL. If told to use an unknown/bad cipher or curve, the error path accidentally skips the verification and returns OK, thus ignoring any certifica…
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High 8.6CVE-2024-2398 EPSS 36%
HTTP/2 push headers memory-leak
When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the prev…
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Low 3.5
Usage of disabled protocol
When a protocol selection parameter option disables all protocols without adding any then the default set of protocols would remain in the allowed set due to an error in the logic for removing protocols. The below command would perform a request to curl.se wi…
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Medium 5.3
OCSP verification bypass with TLS session reuse
curl inadvertently kept the SSL session ID for connections in its cache even when the verify status (*OCSP stapling*) test failed. A subsequent transfer to the same hostname could then succeed if the session ID cache was still fresh, which then skipped the ve…
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Medium 5.3
When saving HSTS data to an excessively long file name, curl could end up removing all contents, making subsequent requ…
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Medium 6.5
This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than …
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High 8.8
This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the h…
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Unscored —
This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of …
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High 7.5
When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl…
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High 7.8CVE-2019-5436 EPSS 50%
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4…
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Unscored —
An integer overflow in curl's URL API results in a buffer overflow in libcurl 7.62.0 to and including 7.64.1.
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Medium 4.3
curl before 7.53.0 has an incorrect TLS Certificate Status Request extension feature that asks for a fresh proof of the…