SB2018011206 - Multiple vulnerabilities in Linux Kernel
Published: January 12, 2018 Updated: June 12, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Null pointer dereference (CVE-ID: CVE-2018-5333)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Green
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the rds_cmsg_atomic function due to insufficient handling of user-supplied input. A remote attacker can send a specially crafted HTTP request, trigger NULL pointer dereference and cause the system to crash.
2) Heap out-of-bounds write (CVE-ID: CVE-2018-5332)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the rds_message_alloc_sgs() function due to improper validation of DMA page allocation values. A local attacker can trigger a heap-based out-of-bounds write and cause the system to crash.
3) Out-of-bounds write (CVE-ID: CVE-2018-5703)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The weakness exists in the tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c due to slab out-of-bounds write. A remote attacker can supply vectors involving TLS, trigger memory corruption and cause the system to crash or execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.