CVSS: 7.8EPSS: 0%CPEs: 19EXPL: 4CVE-2019-18276 – bash: when effective UID is not equal to its real UID the saved UID is not dropped
https://notcve.org/view.php?id=CVE-2019-18276
An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. • https://github.com/M-ensimag/CVE-2019-18276 https://github.com/SABI-Ensimag/CVE-2019-18276 http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E https://security.gentoo.org/glsa/202105-34 https://security.netapp.com/advisory/ntap-20200430-0003 https://www.oracle.com/security-alerts/cp • CWE-271: Privilege Dropping / Lowering Errors CWE-273: Improper Check for Dropped Privileges •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2019-9924 – bash: BASH_CMD is writable in restricted bash shells
https://notcve.org/view.php?id=CVE-2019-9924
rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user to execute any command with the permissions of the shell. rbash en Bash • http://git.savannah.gnu.org/cgit/bash.git/tree/CHANGES?h=bash-4.4-testing#n65 http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00049.html https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1803441 https://lists.debian.org/debian-lts-announce/2019/03/msg00028.html https://security.netapp.com/advisory/ntap-20190411-0001 https://usn.ubuntu.com/4058-1 https://usn.ubuntu.com/4058-2 https://access.redhat.com/security/cve/CVE-2019-9924 https://bugzilla.r • CWE-138: Improper Neutralization of Special Elements CWE-862: Missing Authorization •
CVSS: 8.4EPSS: 0%CPEs: 4EXPL: 0CVE-2016-7543 – bash: Specially crafted SHELLOPTS+PS4 variables allows command substitution
https://notcve.org/view.php?id=CVE-2016-7543
Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables. Bash en versiones anteriores a 4.4 permite a usuarios locales ejecutar comandos arbitrarios con privilegios root a través de variables de entorno SHELLOPTS y PS4 manipuladas. An arbitrary command injection flaw was found in the way bash processed the SHELLOPTS and PS4 environment variables. A local, authenticated attacker could use this flaw to exploit poorly written setuid programs to elevate their privileges under certain circumstances. • http://rhn.redhat.com/errata/RHSA-2017-0725.html http://www.openwall.com/lists/oss-security/2016/09/26/9 http://www.securityfocus.com/bid/93183 http://www.securitytracker.com/id/1037812 https://access.redhat.com/errata/RHSA-2017:1931 https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05388115 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7XOQSHU63Y357NHU5FPTFBM6I3YOCQB https://lists.fedoraproject.org/archives/list&#x • CWE-20: Improper Input Validation CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') •
CVSS: 5.5EPSS: 0%CPEs: 22EXPL: 0CVE-2016-9401 – bash: popd controlled free
https://notcve.org/view.php?id=CVE-2016-9401
popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address. popd en bash podrían permitir a usuarios locales eludir el shell restringido y provocar un uso después de liberación de memoria a través de una dirección manipulada. A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session. • http://rhn.redhat.com/errata/RHSA-2017-0725.html http://www.openwall.com/lists/oss-security/2016/11/17/5 http://www.openwall.com/lists/oss-security/2016/11/17/9 http://www.securityfocus.com/bid/94398 https://access.redhat.com/errata/RHSA-2017:1931 https://lists.debian.org/debian-lts-announce/2019/03/msg00028.html https://security.gentoo.org/glsa/201701-02 https://access.redhat.com/security/cve/CVE-2016-9401 https://bugzilla.redhat.com/show_bug.cgi?id=1396383 • CWE-416: Use After Free •
CVSS: 10.0EPSS: 97%CPEs: 28EXPL: 5CVE-2014-6278 – Sun Secure Global Desktop and Oracle Global Desktop 4.61.915 - Command Injection (Shellshock)
https://notcve.org/view.php?id=CVE-2014-6278
GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277. GNU Bash hasta 4.3 bash43-026 no analiza debidamente las definiciones de funciones en los valores de las variables de entornos, lo que permite a atacantes remotos ejecutar comandos arbitrarios a través de un entorno manipulado, como fue demostrado por vectores involucrando la caracteristica ForceCommand en OpenSSH sshd, los módulos mod_cgi y mod_cgid en el servidor Apache HTTP, secuencias de comandos ejecutadas por clientes DHCP no especificados, y otras situaciones en las cuales la configuración del entorno ocurre tras un límite de privilegios de la ejecución de Bash. NOTA: esta vulnerabilidad existe debido a una solución incompleta para el CVE-2014-6271, CVE-2014-7169, y CVE-2014-6277. DNS reverse lookups can be used as a vector of attack for the bash shellshock vulnerability. • https://www.exploit-db.com/exploits/39887 https://www.exploit-db.com/exploits/39568 https://www.exploit-db.com/exploits/34900 https://www.exploit-db.com/exploits/36933 https://www.exploit-db.com/exploits/34860 http://jvn.jp/en/jp/JVN55667175/index.html http://jvndb.jvn.jp/jvndb/JVNDB-2014-000126 http://lcamtuf.blogspot.com/2014/09/bash-bug-apply-unofficial-patch-now.html http://lcamtuf.blogspot.com/2014/10/bash-bug-how-we-finally-cracked.html http://linux.or • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •