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 •
CVSS: 9.8EPSS: 1%CPEs: 4EXPL: 0CVE-2016-7167 – curl: escape and unescape integer overflows
https://notcve.org/view.php?id=CVE-2016-7167
Multiple integer overflows in the (1) curl_escape, (2) curl_easy_escape, (3) curl_unescape, and (4) curl_easy_unescape functions in libcurl before 7.50.3 allow attackers to have unspecified impact via a string of length 0xffffffff, which triggers a heap-based buffer overflow. Múltiples desbordamientos de entero en las funciones (1) curl_escape, (2) curl_easy_escape, (3) curl_unescape y (4) curl_easy_unescape en libcurl en versiones anteriores a 7.50.3 permiten a atacantes tener impacto no especificado a través de una cadena de longitud 0xffffffff, lo que desencadena un desbordamiento de búfer basado en memoria dinámica. Multiple integer overflow flaws leading to heap-based buffer overflows were found in the way curl handled escaping and unescaping of data. An attacker could potentially use these flaws to crash an application using libcurl by sending a specially crafted input to the affected libcurl functions. • http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html http://www.securityfocus.com/bid/92975 http://www.securitytracker.com/id/1036813 http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.538632 https://access.redhat.com/errata/RHSA-2017:2016 https://access.redhat.com/errata/RHSA-2018:2486 https://access.redhat.com/errata/RHSA-2018:3558 https://curl.haxx.se/docs/adv_20160914.html https://lists.debian.org/debian-lts-announ • CWE-190: Integer Overflow or Wraparound •