CVSS: 3.3EPSS: 0%CPEs: 2EXPL: 1CVE-2021-36087 – libsepol: heap-based buffer overflow in ebitmap_match_any()
https://notcve.org/view.php?id=CVE-2021-36087
The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block. El compilador CIL en SELinux 3.2 tiene una sobrelectura del búfer basada en el montón en ebitmap_match_any (llamado indirectamente desde cil_check_neverallow). Esto ocurre porque a veces no se comprueban las declaraciones no válidas en un bloque opcional • https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675 https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521 https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T https://access.redhat.com/security/cve/CVE-2021-36087 https:/&# • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read •
CVSS: 3.3EPSS: 0%CPEs: 2EXPL: 1CVE-2021-36085 – libsepol: use-after-free in __cil_verify_classperms()
https://notcve.org/view.php?id=CVE-2021-36085
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __verify_map_perm_classperms and hashtab_map). El compilador CIL en SELinux versión 3.2, presenta un uso de la memoria previamente liberada en la función __cil_verify_classperms (llamado desde __verify_map_perm_classperms y hashtab_map) • https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124 https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cba https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.yaml https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR https://access.redhat.com/security/cve/CVE-2021-36085 https://bugzilla.redhat.com/show_bug.cgi?id=1979664 • CWE-416: Use After Free •
CVSS: 3.3EPSS: 0%CPEs: 2EXPL: 1CVE-2021-36084 – libsepol: use-after-free in __cil_verify_classperms()
https://notcve.org/view.php?id=CVE-2021-36084
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper). El compilador CIL en SELinux versión 3.2,, presenta un uso de la memoria previamente liberada en la función __cil_verify_classperms (llamado desde __cil_verify_classpermission y __cil_pre_verify_helper) • https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31065 https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a3936a8a361f3 https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaml https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR https://access.redhat.com/security/cve/CVE-2021-36084 https://bugzilla.redhat.com/show_bug.cgi?id=1979662 • CWE-416: Use After Free •
CVSS: 6.1EPSS: 0%CPEs: 3EXPL: 0CVE-2020-10751 – kernel: SELinux netlink permission check bypass
https://notcve.org/view.php?id=CVE-2020-10751
A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing. Se detectó un fallo en la implementación del enlace SELinux LSM de kernels de Linux versiones anteriores a 5.7, donde se asumía incorrectamente que un skb solo contendría un único mensaje netlink. El enlace incorrectamente solo comprobaría el primer mensaje netlink en el skb y permitiría o denegaría el resto de los mensajes dentro del skb con el permiso otorgado sin procesamiento adicional. A flaw was found in the Linux kernel’s SELinux LSM hook implementation, where it anticipated the skb would only contain a single Netlink message. • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html http://www.openwall.com/lists/oss-security/2020/05/27/3 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10751 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb73974172ffaaf57a7c42f35424d9aece1a5af6 https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce • CWE-345: Insufficient Verification of Data Authenticity CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data •