CVE-2020-24046
It limits the admin user to a restricted shell, allowing execution of a small number of tools of the operating system.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A sandbox escape issue was discovered in TitanHQ SpamTitan Gateway 7.07. It limits the admin user to a restricted shell, allowing execution of a small number of tools of the operating system. This restricted shell can be bypassed after changing the properties of the user admin in the operating system file /etc/passwd. This file cannot be accessed though the restricted shell, but it can be modified by abusing the Backup/Import Backup functionality of the web interface. An authenticated attacker would be able to obtain the file /var/tmp/admin.passwd after executing a Backup operation. This file can be manually modified to change the GUID of the user to 0 (root) and change the restricted shell to a normal shell /bin/sh. After the modification is done, the file can be recompressed to a .tar.bz file and imported again via the Import Backup functionality. The properties of the admin user will be overwritten and a root shell will be granted to the user upon the next successful login.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.41% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- titanhq/spamtitan
- Source
- cve@mitre.org
References
- https://github.com/felmoltorThird Party Advisory
- https://sensepost.com/blog/2020/clash-of-the-spamtitan/Exploit, Third Party Advisory
- https://twitter.com/felmoltorThird Party Advisory
- https://www.titanhq.comVendor Advisory
- https://github.com/felmoltorThird Party Advisory
- https://sensepost.com/blog/2020/clash-of-the-spamtitan/Exploit, Third Party Advisory
- https://twitter.com/felmoltorThird Party Advisory
- https://www.titanhq.comVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.