CVE-2021-37533

Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

Apache Commons Net library contains a collection of network utilities and protocol implementations. Supported protocols include: Echo, Finger, FTP, NNTP, NTP, POP3(S), SMTP(S), Telnet, Whois

Security Fix(es):

Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.(CVE-2021-37533)

Red Hat Lightwell has released commons-net:commons-net 3.5.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.5.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.7.1.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.7.1 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 2.0.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 2.0.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.4.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.4.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.3.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.3.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.7.2.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.7.2 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.2.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.2.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.8.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.8.0 from Maven Central.

Red Hat Lightwell has released commons-net:commons-net 3.6.0.rhlw-00001 with a backported security fix.

CVE-2021-37533: Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

This patched artifact is a drop-in replacement for commons-net:commons-net 3.6.0 from Maven Central.

Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.

These are all security issues fixed in the apache-commons-net-3.9.0-1.1 package on the GA media of openSUSE Tumbleweed.

ZeddYu Lu discovered that the FTP client from Apache Commons Net trusted the host from PASV responses by default. A remote attacker with a malicious FTP server could redirect the client to another server, which could possibly result in leaked information about services running on the private network of the client.