SB2019052408 - Denial of service in libreswan
Published: May 24, 2019 Updated: May 12, 2020
Security Bulletin ID
SB2019052408
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-2019-12312)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference issue within the send_v2N_spi_response_from_state() function in programs/pluto/ikev2_send.c. A remote attacker can cause an assertion failure by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the expected IKE_AUTH exchange and cause the pluto IKE daemon to restart.
Remediation
Install update from vendor's website.
References
- http://www.iwantacve.cn/index.php/archives/218/
- https://github.com/libreswan/libreswan/compare/9b1394e...3897683
- https://github.com/libreswan/libreswan/issues/246
- https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt
- https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch