CVSS: 4.8EPSS: 0%CPEs: 1EXPL: 2CVE-2023-4039 – GCC's-fstack-protector fails to guard dynamically-sized local variables on AArch64
https://notcve.org/view.php?id=CVE-2023-4039
**DISPUTED**A failure in the -fstack-protector feature in GCC-based toolchains that target AArch64 allows an attacker to exploit an existing buffer overflow in dynamically-sized local variables in your application without this being detected. This stack-protector failure only applies to C99-style dynamically-sized local variables or those created using alloca(). The stack-protector operates as intended for statically-sized local variables. The default behavior when the stack-protector detects an overflow is to terminate your application, resulting in controlled loss of availability. An attacker who can exploit a buffer overflow without triggering the stack-protector might be able to change program flow control to cause an uncontrolled loss of availability or to go further and affect confidentiality or integrity. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself. • https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64 https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf • CWE-693: Protection Mechanism Failure •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 1CVE-2021-37322
https://notcve.org/view.php?id=CVE-2021-37322
GCC c++filt v2.26 was discovered to contain a use-after-free vulnerability via the component cplus-dem.c. Se ha detectado que GCC c++filt versión v2.26 contiene una vulnerabilidad de uso de memoria previamente liberada por medio del componente cplus-dem.c. • https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99188 • CWE-416: Use After Free •
CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 0CVE-2019-15847 – gcc: POWER9 "DARN" RNG intrinsic produces repeated output
https://notcve.org/view.php?id=CVE-2019-15847
The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same. El backend POWER9 en GNU Compiler Collection (GCC) en versiones anteriores a la 10 podría optimizar múltiples llamadas de __builtin_darn intrínsecas en una sola llamada, reduciendo así la entropía del generador de números aleatorios. Esto ocurrió porque no se especificó una operación volátil. • http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481 https://access.redhat.com/security/cve/CVE-2019-15847 https://bugzilla.redhat.com/show_bug.cgi?id=1755523 • CWE-331: Insufficient Entropy •
CVSS: 8.1EPSS: 0%CPEs: 1EXPL: 1CVE-2018-12886
https://notcve.org/view.php?id=CVE-2018-12886
stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler Collection (GCC) 4.1 through 8 (under certain circumstances) generate instruction sequences when targeting ARM targets that spill the address of the stack protector guard, which allows an attacker to bypass the protection of -fstack-protector, -fstack-protector-all, -fstack-protector-strong, and -fstack-protector-explicit against stack overflow by controlling what the stack canary is compared against. stack_protect_prologue en cfgexpand.c y stack_protect_epilogue en function.c en GNU Compiler Collection (GCC) 4.1 a 8 (bajo ciertas circunstancias) genera secuencias de instrucciones al apuntar a objetivos ARM que derraman la dirección del protector de pila, que permite al atacante eludir el la protección de -fstack-protector, -fstack-protector-all, -fstack-protector-strong y -fstack-protector-explicit contra el desbordamiento de pila controlando contra qué se compara la pila Canary. • https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm-protos.h?revision=266379&view=markup https://www.gnu.org/software/gcc/gcc-8/changes.html • CWE-209: Generation of Error Message Containing Sensitive Information •
CVSS: 5.6EPSS: 0%CPEs: 13EXPL: 0CVE-2017-11671 – gcc: GCC generates incorrect code for RDRAND/RDSEED intrinsics
https://notcve.org/view.php?id=CVE-2017-11671
Under certain circumstances, the ix86_expand_builtin function in i386.c in GNU Compiler Collection (GCC) version 4.6, 4.7, 4.8, 4.9, 5 before 5.5, and 6 before 6.4 will generate instruction sequences that clobber the status flag of the RDRAND and RDSEED intrinsics before it can be read, potentially causing failures of these instructions to go unreported. This could potentially lead to less randomness in random number generation. Bajo ciertas circunstancias, la función ix86_expand_builtin en el archivo i386.c en GNU Compiler Collection (GCC) versiones 4.6, 4.7, 4.8, 4.9, versión 5 anterior a 5.5 y versión 6 anterior a 6.4, generará secuencias de instrucciones que marcarán el flag status de los intrínsecos RDRAND y RDSEED antes de que se pueda leer, es posible que no se denuncien los fallos de estas instrucciones. Esto podría potencialmente conllevar a una menor aleatoriedad en la generación de números aleatorios. • http://openwall.com/lists/oss-security/2017/07/27/2 http://www.securityfocus.com/bid/100018 https://access.redhat.com/errata/RHSA-2018:0849 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180 https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01349.html https://access.redhat.com/security/cve/CVE-2017-11671 https://bugzilla.redhat.com/show_bug.cgi?id=1475733 • CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) •