Null pointer dereference in systemd - CVE-2017-9217
Published: July 4, 2017 / Updated: August 24, 2017
Vulnerability identifier: #VU7301
CSH Severity: Medium
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-9217
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to null pointer dereference in dns_packet_is_reply_for function in resolved-dns-packet.c file. A remote attacker can supply a specially crafted DNS response with an empty question section to cause the daemon to crash.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists due to null pointer dereference in dns_packet_is_reply_for function in resolved-dns-packet.c file. A remote attacker can supply a specially crafted DNS response with an empty question section to cause the daemon to crash.
Successful exploitation of the vulnerability results in denial of service.
Affected software
systemd
Arch Linux
Fedora
Arch Linux
Fedora
How to mitigate CVE-2017-9217
Update to the latest version.
systemd - addressed in versions 229-20.fc24, 231-15.fc25, 233-4.fc26