CVE-2021-29424 Security feature bypass in n/a
Attackers can bypass IP-based access controls by using IP addresses with leading zeros, affecting applications using the Perl Net::Netmask module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-29424?
CVE-2021-29424 is a high-severity vulnerability in Fedoraproject Fedora, published on 29 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-704
Which versions are affected by CVE-2021-29424?
It affects 2 products.
Linux distribution packages (4)
perl-Net-Netmask SUSE:Package Hub 15 SP4 | All versions | 1.9022-bp154.2.3.1 |
perl-Net-Netmask SUSE:Package Hub 15 SP5 | All versions | 1.9022-bp155.3.3.1 |
perl-Net-Netmask openSUSE:Leap 15.4 | All versions | 1.9022-bp154.2.3.1 |
perl-Net-Netmask openSUSE:Leap 15.5 | All versions | 1.9022-bp155.3.3.1 |
Products include Fedoraproject Fedora, Net\ \.
How do I fix CVE-2021-29424?
Upgrade to a fixed version.
Is CVE-2021-29424 being exploited?
There is no known exploitation of CVE-2021-29424 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2021-29424, GHSA-p75p-x3j9-7vj3, MGASA-2021-0375, UBUNTU-CVE-2021-29424, openSUSE-SU-2023:0215-1, openSUSE-SU-2023:0217-1.