Multiple vulnerabilities in MIT Kerberos
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-11462 CVE-2017-11368 |
| CWE-ID | CWE-415 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Kerberos Server applications / Encryption software |
| Vendor | MIT |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Double free error
EUVDB-ID: #VU8900
Risk: High
CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11462
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The weakness exists due to double free during the automatic deletion of security contexts on error by the GSS-API. A remote attacker can delete an existing security context on a second or subsequent call to gss_init_sec_context() or gss_accept_sec_context(), trigger memory corruption and cause denial of service or execute arbitrary code.
Update to version 1.14.6 or 1.15.2.
Vulnerable software versionsKerberos: 5-1.13.4 - 5-1.15.1
External linkshttp://krbdev.mit.edu/rt/Ticket/Display.html?id=8598
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Denial of service
EUVDB-ID: #VU8901
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11368
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.
The weakness exists due to an assertion failure. A remote attacker can send invalid S4U2Self or S4U2Proxy requests and cause the krb5kdc service to exit on a targeted system.
Successful exploitation of the vulnerability results in denial of service.
Update to version 1.14.6 or 1.15.2.
Vulnerable software versionsKerberos: 5 1.13 - 5-1.15.1
External linkshttp://krbdev.mit.edu/rt/Ticket/Display.html?id=8599
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
