Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2017-11103 |
CWE-ID | CWE-311 |
Exploitation vector | Local network |
Public exploit | N/A |
Vulnerable software Subscribe |
Samba Server applications / Directory software, identity management |
Vendor | Samba |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU7482
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-11103
CWE-ID:
CWE-311 - Missing Encryption of Sensitive Data
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to impersonate a trusted server and intercept users' credentials.
The vulnerability exists due to the KDC-REP service name is stored in unencrypted "ticket" instead of encrypted "enc_part" and used later by the _krb5_extract_ticket() function. An attacker in local network can perform a man-in-the-middle attack, intercept the KDC-REP service name and impersonate a trusted server.
Successful exploitation of the vulnerability may allow an attacker to obtain credentials of all Samba users from Samba DRS replication service during password replication process between trusted and fake DC.
Update to version 4.6.6, 4.5.12 or 4.4.15
Vulnerable software versionsSamba: 4.0.0 - 4.6.5
External linkshttp://www.samba.org/samba/security/CVE-2017-11103.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.