SB2021051820 - Improper authentication in Linux kernel
Published: May 18, 2021
Security Bulletin ID
SB2021051820
CSH Severity
Low
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 vulnerability.
1) Improper authentication (CVE-ID: CVE-2002-2438)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 8.7 [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]
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
TCP firewalls could be circumvented by sending a SYN Packets with other flags (like e.g. RST flag) set, which was not correctly discarded by the Linux TCP stack after firewalling.
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2012/05/30/11
- https://www.kb.cert.org/vuls/id/464113
- http://www.openwall.com/lists/oss-security/2012/05/29/8
- https://www.openwall.com/lists/oss-security/2012/02/03/7
- http://www.openwall.com/lists/oss-security/2012/02/03/7
- http://www.openwall.com/lists/oss-security/2012/05/30/9
- http://www.openwall.com/lists/oss-security/2014/02/12/8
- http://www.openwall.com/lists/oss-security/2012/05/30/8
- http://www.openwall.com/lists/oss-security/2012/05/30/12
- http://www.openwall.com/lists/oss-security/2012/05/30/13
- http://www.openwall.com/lists/oss-security/2012/05/30/4
- http://www.openwall.com/lists/oss-security/2012/05/31/3
- http://www.openwall.com/lists/oss-security/2012/05/30/2
- https://security.netapp.com/advisory/ntap-20210727-0003/
- https://bugzilla.suse.com/show_bug.cgi?id=744994%2C
- https://www.kb.cert.org/vuls/id/464113%2C