Description
In the Linux kernel before version 4.12, Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.
CVSS breakdown
CVSS 3.0
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected products
- Unknown / kernel4.12 – 4.12
References
- MISChttp://www.securityfocus.com/bid/99299
- MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0
- MISChttp://www.securitytracker.com/id/1038787
- VENDOR_ADVISORYhttps://www.debian.org/security/2017/dsa-3927
- VENDOR_ADVISORYhttps://www.debian.org/security/2017/dsa-3945
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482
- MAILING_LISThttp://seclists.org/oss-sec/2017/q2/602
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0641