Vulnerability Details : 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. However, binaries running with an effective UID of 0 are unaffected.
Products affected by CVE-2019-18276
- cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:*
- cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-18276
0.18%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 55 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-18276
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2019-18276
-
The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-18276
-
http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html
Bash 5.0 Patch 11 Privilege Escalation ≈ Packet StormExploit;Third Party Advisory;VDB Entry
-
https://www.oracle.com/security-alerts/cpuapr2022.html
Oracle Critical Patch Update Advisory - April 2022Patch;Third Party Advisory
-
https://www.youtube.com/watch?v=-wGtxJ8opa8
Zero-day vulnerability in Bash - Suidbash Google CTF Finals 2019 (pwn) - YouTubeExploit;Third Party Advisory
-
https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff
commit bash-20190628 snapshot · bminor/bash@951bdaa · GitHubPatch;Third Party Advisory
-
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
[jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar - Pony MailMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202105-34
Bash: Privilege escalation (GLSA 202105-34) — Gentoo securityThird Party Advisory
-
https://security.netapp.com/advisory/ntap-20200430-0003/
CVE-2019-18276 GNU Bash Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
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