SB2018031004 - Fedora 27 update for kernel
Published: March 10, 2018 Updated: April 24, 2025
Security Bulletin ID
SB2018031004
Severity
High
Patch available
YES
Number of vulnerabilities
4
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2018-5703)
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.
2) Null pointer dereference (CVE-ID: CVE-2018-1065)
The vulnerability allows a local attacker to cause DoS condition no the target system.The weakness exists due to NULL pointer dereference. A local attacker with the capability to insert iptables/netfilter rules can leverage the CAP_NET_RAW or CAP_NET_ADMIN capability, related to arpt_do_table in net/ipv4/netfilter/arp_tables.c, ipt_do_table in net/ipv4/netfilter/ip_tables.c, and ip6t_do_table in net/ipv6/netfilter/ip6_tables.c, trigger a jump to an invalid chain and cause the system to crash.
3) Memory corruption (CVE-ID: CVE-2018-5803)
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the _sctp_make_chunk() function due to boundary error. A local attacker can submit a crafted SCTP packet, trigger memory corruption and cause the service to crash.
4) Memory leak (CVE-ID: CVE-2018-7757)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists in the drivers/scsi/libsas/sas_expander.c source code in the sas_smp_get_phy_events function due to memory leak. A local attacker can trigger memory corruption and cause the system to crash.
Remediation
Install update from vendor's website.