CVE-2017-11103 Auth bypass in n/a
Remote attackers can impersonate services by exploiting a Kerberos protocol violation in Heimdal, allowing unauthorized access and potential account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-11103?
CVE-2017-11103 is a high-severity authentication bypass vulnerability in Apple Iphone Os, published on 13 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.
Weakness: CWE-345
Which versions are affected by CVE-2017-11103?
It affects 6 products.
Linux distribution packages (6)
samba SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
resource-agents SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 4.0.1+git.1495055229.643177f1-2.4.2 |
samba SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
samba SUSE:Linux Enterprise Server 12 SP3 | All versions | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
samba SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
samba SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
Products include Apple Iphone Os, Apple Mac Os X, Debian Debian Linux, Freebsd Freebsd, Heimdal Project Heimdal, Samba Samba.
How do I fix CVE-2017-11103?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-11103 being exploited?
There is no known exploitation of CVE-2017-11103 in the wild and no public exploit code.
Other vulnerabilities in Apple Iphone Os
Sources
Also known as ALPINE-CVE-2017-11103, CLEANSTART-2024-WM93067, DEBIAN-CVE-2017-11103, DLA-1027-1, DSA-3909-1, DSA-3912-1 and 8 more.