#VU100006 Improper authorization in Linux kernel - CVE-2001-0851

Vulnerability identifier: #VU100006

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2001-0851

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Linux kernel 2.0, 2.2 and 2.4 with syncookies enabled allows remote attackers to bypass firewall rules by brute force guessing the cookie.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000432
https://www.caldera.com/support/security/advisories/CSSA-2001-038.0.txt
https://www.linux-mandrake.com/en/security/2001/MDKSA-2001-082.php3
https://www.linuxsecurity.com/advisories/other_advisory-1683.html
https://www.novell.com/linux/security/advisories/2001_039_kernel2_txt.html
https://www.redhat.com/support/errata/RHSA-2001-142.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/7461

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.