SB2019051523 - Input validation error in FreeBSD
Published: May 15, 2019 Updated: August 8, 2020
Security Bulletin ID
SB2019051523
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2019-5598)
The vulnerability allows a remote non-authenticated attacker to manipulate data.
In FreeBSD 11.3-PRERELEASE before r345378, 12.0-STABLE before r345377, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in pf does not check if the outer ICMP or ICMP6 packet has the same destination IP as the source IP of the inner protocol packet allowing a maliciously crafted ICMP/ICMP6 packet could bypass the packet filter rules and be passed to a host that would otherwise be unavailable.
Remediation
Install update from vendor's website.
References
- http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.html
- http://www.securityfocus.com/bid/108395
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.asc
- https://security.netapp.com/advisory/ntap-20190611-0001/
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.synacktiv.com/posts/systems/icmp-reachable.html