What’s Vulnerable › Vulnerabilities

CVE-2001-0851

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2001-12-06 · updated 2026-06-16

Description

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.

Affected products

• Caldera Openlinux: 2.3
• Caldera Openlinux Edesktop: 2.4
• Caldera Openlinux Eserver: 2.3.1
• Caldera Openlinux Server: 3.1
• Caldera Openlinux Workstation: 3.1
• Linux kernel: 2.0, 2.2.0, 2.4.0
• Suse Linux: 6.3, 6.4, 7.0, 7.1, 7.2, 7.3

References

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

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