CVSS: 7.8EPSS: 0%CPEs: 19EXPL: 0CVE-2021-23177 – libarchive: extracting a symlink with ACLs modifies ACLs of target
https://notcve.org/view.php?id=CVE-2021-23177
An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL of a file on the system and gain more privileges. Un fallo de resolución de enlaces inapropiado mientras es extraído un archivo puede conllevar a un cambio de la lista de control de acceso (ACL) del objetivo del enlace. Un atacante puede proporcionar un archivo malicioso a un usuario víctima, que desencadenaría este fallo cuando intentara extraer el archivo. • https://access.redhat.com/security/cve/CVE-2021-23177 https://bugzilla.redhat.com/show_bug.cgi?id=2024245 https://github.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336bad https://github.com/libarchive/libarchive/issues/1565 https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html • CWE-59: Improper Link Resolution Before File Access ('Link Following') •
CVSS: 9.9EPSS: 18%CPEs: 42EXPL: 3CVE-2021-44142 – Samba fruit_pwrite Heap-based Buffer Overflow Remote Code Execution Vulnerability
https://notcve.org/view.php?id=CVE-2021-44142
The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver." Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root. El módulo vfs_fruit de Samba usa atributos de archivo extendidos (EA, xattr) para proporcionar "...compatibilidad mejorada con los clientes SMB de Apple e interoperabilidad con un servidor de archivos AFP de Netatalk 3". Samba versiones anteriores a 4.13.17, 4.14.12 y 4.15.5 con vfs_fruit configurado permiten una lectura y escritura fuera de límites de la pila por medio de atributos de archivo extendidos especialmente diseñados. • https://github.com/horizon3ai/CVE-2021-44142 https://github.com/gudyrmik/CVE-2021-44142 https://github.com/hrsman/Samba-CVE-2021-44142 https://bugzilla.samba.org/show_bug.cgi?id=14914 https://kb.cert.org/vuls/id/119678 https://security.gentoo.org/glsa/202309-06 https://www.samba.org/samba/security/CVE-2021-44142.html https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin https://access.redhat&# • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 56EXPL: 33CVE-2021-4034 – Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
https://notcve.org/view.php?id=CVE-2021-4034
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine. • https://github.com/dzonerzy/poc-cve-2021-4034 https://github.com/arthepsy/CVE-2021-4034 https://github.com/berdav/CVE-2021-4034 https://www.exploit-db.com/exploits/50689 https://github.com/PwnFunction/CVE-2021-4034 https://github.com/joeammond/CVE-2021-4034 https://github.com/nikaiw/CVE-2021-4034 https://github.com/ryaagard/CVE-2021-4034 https://github.com/Rvn0xsy/CVE-2021-4034 https://github.com/Ayrx/CVE-2021-4034 https://github.com/zhzyker/CVE-2021-4034& • CWE-20: Improper Input Validation CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 6.5EPSS: 0%CPEs: 12EXPL: 0CVE-2021-3930 – QEMU: off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c
https://notcve.org/view.php?id=CVE-2021-3930
An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition. Se ha encontrado un error "off-by-one" en la emulación de dispositivos SCSI en QEMU. Podía ocurrir mientras eran procesados comandos MODE SELECT en mode_sense_page() si el argumento "page" era establecido como MODE_PAGE_ALLS (0x3f). • https://bugzilla.redhat.com/show_bug.cgi?id=2020588 https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20220225-0007 https://access.redhat.com/security/cve/CVE-2021-3930 • CWE-193: Off-by-one Error •
CVSS: 8.1EPSS: 0%CPEs: 12EXPL: 0CVE-2021-23214 – postgresql: server processes unencrypted bytes from man-in-the-middle
https://notcve.org/view.php?id=CVE-2021-23214
When the server is configured to use trust authentication with a clientcert requirement or to use cert authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of SSL certificate verification and encryption. Cuando el servidor está configurado para usar la autenticación confiable con un requisito de clientcert o para usar la autenticación de cert, un atacante de tipo man-in-the-middle puede inyectar consultas SQL arbitrarias cuando es establecida una conexión por primera vez, a pesar del uso de la verificación y el cifrado del certificado SSL It was found that a PostgreSQL server could accept plain text data during the establishment of an SSL connection. When a user is requesting a certificate based authentication, an active Person in the Middle could use this flaw in order to inject arbitrary SQL commands. • https://bugzilla.redhat.com/show_bug.cgi?id=2022666 https://git.postgresql.org/gitweb/?p=postgresql.git%3Ba=commit%3Bh=28e24125541545483093819efae9bca603441951 https://github.com/postgres/postgres/commit/28e24125541545483093819efae9bca603441951 https://security.gentoo.org/glsa/202211-04 https://www.postgresql.org/support/security/CVE-2021-23214 https://access.redhat.com/security/cve/CVE-2021-23214 • CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') •