CVSS: 7.5EPSS: 0%CPEs: 117EXPL: 0CVE-2017-1000254 – curl: FTP PWD response parser out of bounds read
https://notcve.org/view.php?id=CVE-2017-1000254
libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. • http://www.debian.org/security/2017/dsa-3992 http://www.securityfocus.com/bid/101115 http://www.securitytracker.com/id/1039509 https://access.redhat.com/errata/RHSA-2018:2486 https://access.redhat.com/errata/RHSA-2018:3558 https://curl.haxx.se/673d0cd8.patch https://curl.haxx.se/docs/adv_20171004.html https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-1000099
https://notcve.org/view.php?id=CVE-2017-1000099
When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the application's provide callback), which could lead to other private data from the heap to get inadvertently displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to not contain any zero byte, it would continue and display the data following that buffer in memory. A la hora de pedir un archivo de una URL de tipo "file://", libcurl ofrece una característica que envía metadatos sobre el archivo mediante cabeceras HTTP. El código responsable de esto enviaría el búfer erróneo al usuario (stdout o la llamada de vuelta de la aplicación), lo que podría provocar que otros datos privados de la memoria dinámica (heap) se muestren en consecuencia. • http://www.securityfocus.com/bid/100281 http://www.securitytracker.com/id/1039119 https://curl.haxx.se/0809C.patch https://curl.haxx.se/docs/adv_20170809C.html https://security.gentoo.org/glsa/201709-14 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 6.5EPSS: 0%CPEs: 79EXPL: 0CVE-2017-1000100 – curl: TFTP sends more than buffer size
https://notcve.org/view.php?id=CVE-2017-1000100
When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the untruncated length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS. • http://www.debian.org/security/2017/dsa-3992 http://www.securityfocus.com/bid/100286 http://www.securitytracker.com/id/1039118 https://access.redhat.com/errata/RHSA-2018:3558 https://curl.haxx.se/docs/adv_20170809B.html https://security.gentoo.org/glsa/201709-14 https://support.apple.com/HT208221 https://access.redhat.com/security/cve/CVE-2017-1000100 https://bugzilla.redhat.com/show_bug.cgi?id=1478310 • CWE-125: Out-of-bounds Read CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-7468
https://notcve.org/view.php?id=CVE-2017-7468
In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range. En curl y libcurl 7.52.0 hasta e incluyendo la versión 7.53.1, libcurl intenta retomar una sesión TLS aunque el certificado del cliente haya cambiado. • http://www.securityfocus.com/bid/97962 http://www.securitytracker.com/id/1038341 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 https://curl.haxx.se/docs/adv_20170419.html https://security.gentoo.org/glsa/201709-14 • CWE-295: Improper Certificate Validation •
CVSS: 9.8EPSS: 1%CPEs: 1EXPL: 0CVE-2016-8622 – curl: URL unescape heap overflow via integer truncation
https://notcve.org/view.php?id=CVE-2016-8622
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer. La función URL percent-encoding en libcurl en versiones anteriores a la 7.51.0 se denomina "curl_easy_unescape". Internamente, aunque esta función se haya hecho para asignar un búfer de destino no escapado más grande de 2GB, devuelve esa nueva longitud en una variable de enteros de 32 bits. • http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html http://www.securityfocus.com/bid/94105 http://www.securitytracker.com/id/1037192 https://access.redhat.com/errata/RHSA-2018:2486 https://access.redhat.com/errata/RHSA-2018:3558 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622 https://curl.haxx.se/docs/adv_20161102H.html https://security.gentoo.org/glsa/201701-47 https://www.tenable.com/security/tns-2016-21 https://access.redhat.com/securit • CWE-122: Heap-based Buffer Overflow CWE-190: Integer Overflow or Wraparound CWE-787: Out-of-bounds Write •