7.8

CVE-2019-18276

Exploit

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.

Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Gnu ≫ Bash Version <= 5.0
Gnu ≫ Bash Version5.0 Updatebeta1
Gnu ≫ Bash Version5.0 Updatebeta2
Gnu ≫ Bash Version5.0 Updatepatch1
Gnu ≫ Bash Version5.0 Updatepatch10
Gnu ≫ Bash Version5.0 Updatepatch11
Gnu ≫ Bash Version5.0 Updatepatch2
Gnu ≫ Bash Version5.0 Updatepatch3
Gnu ≫ Bash Version5.0 Updatepatch4
Gnu ≫ Bash Version5.0 Updatepatch5
Gnu ≫ Bash Version5.0 Updatepatch6
Gnu ≫ Bash Version5.0 Updatepatch7
Gnu ≫ Bash Version5.0 Updatepatch8
Gnu ≫ Bash Version5.0 Updatepatch9
Gnu ≫ Bash Version5.0 Updaterc1
Netapp ≫ Oncommand Unified Manager SwPlatformvmware_vsphere Version >= 9.5
Netapp ≫ Solidfire Version-
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 40.02% 0.972
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-273 Improper Check for Dropped Privileges

The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

https://www.youtube.com/watch?v=-wGtxJ8opa8
Third Party Advisory
Exploit