SB2018082119 - NULL pointer dereference in krb5 (Alpine package)
Published: August 21, 2018
Security Bulletin ID
SB2018082119
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2018-5710)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. The pre-defined function "strlen" is getting a "NULL" string as a parameter value in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the Key Distribution Center (KDC), which allows remote authenticated users to cause a denial of service (NULL pointer dereference) via a modified kadmin client.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=90021f2518697d2787dbe8e0d6fef92096ce0bb4
- https://git.alpinelinux.org/aports/commit/?id=a2500ef1ae5455f033e321b01179470b51b624aa
- https://git.alpinelinux.org/aports/commit/?id=896ae53d1849faa57ea676acd47332399c11bae7
- https://git.alpinelinux.org/aports/commit/?id=9f75bfdaed5cb618df31231e870ec6fed8953927
- https://git.alpinelinux.org/aports/commit/?id=cb2ae9a4a2b9b249ba83323406199eb1836f6ded