Vulnerability Name:

CVE-2021-29424 (CCN-199158)

Assigned:2021-03-29
Published:2021-03-29
Updated:2021-06-08
Summary:The Net::Netmask module before 2.0000 for Perl does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-863
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-29424

Source: CCN
Type: Dave Rolsky’s Blog, 2021-03-29
Security Issues in Perl IP Address distros

Source: MISC
Type: Exploit, Third Party Advisory
https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/

Source: XF
Type: UNKNOWN
perl-netnetmask-cve202129424-sec-bypass(199158)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-3d96cfe6a3

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-be62be8c7c

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-c314017fcc

Source: CCN
Type: metacpan Web site
Net-Netmask

Source: MISC
Type: Release Notes, Third Party Advisory
https://metacpan.org/changes/distribution/Net-Netmask#L11-22

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210604-0007/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:net::netmask_project:net::netmask:*:*:*:*:*:perl:*:* (Version < 2.0000)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    net::netmask_project net::netmask *
    fedoraproject fedora 34
    fedoraproject fedora 33
    fedoraproject fedora 32