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CVSS: 7.8EPSS: 0%CPEs: 12EXPL: 4

In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution. En glibc 2.26 y anteriores existe una confusión en el uso de getcwd() por realpath(), que puede emplearse para escribir antes del búfer de destino. Esto conduce a un subdesbordamiento de búfer y a una potencial ejecución de código. glibc suffers from a getcwd() local privilege escalation vulnerability. • https://www.exploit-db.com/exploits/44889 https://www.exploit-db.com/exploits/43775 https://github.com/0x00-0x00/CVE-2018-1000001 https://github.com/usernameid0/tools-for-CVE-2018-1000001 http://seclists.org/oss-sec/2018/q1/38 http://www.securityfocus.com/bid/102525 http://www.securitytracker.com/id/1040162 https://access.redhat.com/errata/RHSA-2018:0805 https://security.netapp.com/advisory/ntap-20190404-0003 https://usn.ubuntu.com/3534-1 https://usn.ubuntu.com • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •

CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0

The GNU C Library (aka glibc or libc6) before 2.27 contains an off-by-one error leading to a heap-based buffer overflow in the glob function in glob.c, related to the processing of home directories using the ~ operator followed by a long string. La biblioteca GNU C (también llamada glibc o libc6) en versiones anteriores a la 2.27 contiene un error por un paso que conduce a un desbordamiento de búfer basado en memoria dinámica (heap) en la función glob en glob.c. Esto se relaciona con el procesamiento de directorios principales empleando el operador ~ seguido por una larga cadena. • http://www.securityfocus.com/bid/101521 https://access.redhat.com/errata/RHSA-2018:0805 https://access.redhat.com/errata/RHSA-2018:1879 https://sourceware.org/bugzilla/show_bug.cgi?id=22320 https://access.redhat.com/security/cve/CVE-2017-15670 https://bugzilla.redhat.com/show_bug.cgi?id=1504804 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-122: Heap-based Buffer Overflow •

CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0

The glob function in glob.c in the GNU C Library (aka glibc or libc6) before 2.27 contains a buffer overflow during unescaping of user names with the ~ operator. La función glob en glob.c en la biblioteca GNU C (también llamada glibc o libc6) en versiones anteriores a la 2.27 contiene un desbordamiento de búfer durante la eliminación del escape de nombres de usuario con el operador ~. • http://www.securityfocus.com/bid/101535 https://access.redhat.com/errata/RHSA-2018:0805 https://access.redhat.com/errata/RHSA-2018:1879 https://sourceware.org/bugzilla/show_bug.cgi?id=22332 https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=a159b53fa059947cc2548e3b0d5bdcf7b9630ba8 https://access.redhat.com/security/cve/CVE-2017-15804 https://bugzilla.redhat.com/show_bug.cgi?id=1505298 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-122: Heap-based Buffer Overflow •

CVSS: 9.3EPSS: 0%CPEs: 10EXPL: 1

elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and decompose_rpath functions. This is associated with misinterpretion of an empty RPATH/RUNPATH token as the "./" directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very uncommon; most likely, no such program is shipped with any common Linux distribution. elf/dl-load.c en la biblioteca GNU C (también llamada glibc o libc6) desde la versión 2.19 hasta la 2.26 manipula incorrectamente RPATH y RUNPATH que contienen $ORIGIN para un programa privilegiado (setuid o AT_SECURE), lo que permite que los usuarios locales obtengan privilegios mediante una librería con malware troyano en el directorio actual. Esto está relacionado con las funciones fillin_rpath y decompose_rpath. Esto se asocia con la interpretación incorrecta de un token RPATH/RUNPATH vacío como el directorio "./". • https://github.com/Xiami2012/CVE-2017-16997-poc http://www.securityfocus.com/bid/102228 https://access.redhat.com/errata/RHBA-2019:0327 https://access.redhat.com/errata/RHSA-2018:3092 https://bugs.debian.org/884615 https://sourceware.org/bugzilla/show_bug.cgi?id=22625 https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html https://access.redhat.com/security/cve/CVE-2017-16997 https://bugzilla.redhat.com/show_bug.cgi?id=1526865 • CWE-426: Untrusted Search Path CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') •

CVSS: 7.5EPSS: 2%CPEs: 4EXPL: 0

res_query in libresolv in glibc before 2.25 allows remote attackers to cause a denial of service (NULL pointer dereference and process crash). La función res_query de libresolv en glibc anterior a la versión 2.25 permite a un atacante remoto provocar una denegación de servicio (desreferencia a NULL pointer y caída del proceso) • http://www.securityfocus.com/bid/99324 http://www.ubuntu.com/usn/USN-3239-1 http://www.ubuntu.com/usn/USN-3239-2 https://access.redhat.com/errata/RHSA-2018:0805 https://bugzilla.redhat.com/show_bug.cgi?id=1249603 https://security.gentoo.org/glsa/201706-19 https://sourceware.org/bugzilla/attachment.cgi?id=8492 https://sourceware.org/bugzilla/show_bug.cgi?id=18784 https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=fc82b0a2dfe7dbd35671c10510a8da1043d746a5 https://sourceware. • CWE-476: NULL Pointer Dereference •