Red Hat update for sudo
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-1000368 CVE-2017-1000367 |
| CWE-ID | CWE-20 CWE-77 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
Red Hat Enterprise Linux for x86_64 Operating systems & Components / Operating system |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Privilege escalation
EUVDB-ID: #VU7193
Risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2017-1000368
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to improper input validation in the get_process_ttyname() function when parsing tty information from the process status file in the proc files by sudo. A local attacker can supply a specially crafted file to obtain potentially sensitive information or execute arbitrary command with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux for x86_64: 6 - 7.0
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux:6:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux:7.0:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2017:1574
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Command injection
EUVDB-ID: #VU6846
Risk: Low
CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2017-1000367
CWE-ID:
CWE-77 - Command injection
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to command validation flaw in the get_process_ttyname() function. A local attacker can issue a specially crafted sudo command, cause the system to recognize the user's tty as an arbitrary file and overwrite arbitrary files. Exploitation of the bug is possible in case a malicious user has sudo privileges, the system contains SELinux and sudo has been built on SELinux support.
Successful exploitation of the vulnerability results in root access to the system.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux for x86_64: 6 - 7.0
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux:6:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux:7.0:*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2017:1574
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
