CVE-2019-18276

תיאור (מקור, אנגלית)

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. However, binaries running with an effective UID of 0 are unaffected.

מדדים

CVSS 3.1

7.8 (HIGH) מקור הציון: NVD CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — סבירות ניצול

3% (אחוזון 100) נכון ל-19/10/2026

CWE

CWE-273

מוצרים מושפעים

gnu: bash; netapp: hci management node; netapp: oncommand unified manager; netapp: solidfire; oracle: communications cloud native core policy

קישורים

• https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff PatchThird Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
• https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff PatchThird Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
• http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escala‮… ExploitThird Party AdvisoryVDB Entry
• https://www.youtube.com/watch?v=-wGtxJ8opa8 ExploitThird Party Advisory
• http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escala‮… ExploitThird Party AdvisoryVDB Entry
• https://www.youtube.com/watch?v=-wGtxJ8opa8 ExploitThird Party Advisory
• https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff04‮…
• https://security.gentoo.org/glsa/202105-34 Third Party Advisory