In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain name that is accessed in a reverse DNS lookup. When "UseReverseDNS on" is enabled, the attacker-supplied hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect exploitability.

According to the versions of the proftpd package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in     scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows     commands (e.g., COPY TO PROGRAM).(CVE-2026-42167)

    In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in     contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain     name that is accessed in a reverse DNS lookup. When 'UseReverseDNS on' is enabled, the attacker-supplied     hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect     exploitability.(CVE-2026-44331)

Tenable has extracted the preceding description block directly from the EulerOS proftpd security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the proftpd package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in     contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain     name that is accessed in a reverse DNS lookup. When 'UseReverseDNS on' is enabled, the attacker-supplied     hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect     exploitability.(CVE-2026-44331)

    mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in     scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows     commands (e.g., COPY TO PROGRAM).(CVE-2026-42167)

Tenable has extracted the preceding description block directly from the EulerOS proftpd security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the proftpd package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in     contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain     name that is accessed in a reverse DNS lookup. When 'UseReverseDNS on' is enabled, the attacker-supplied     hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect     exploitability.(CVE-2026-44331)

    mod_sql in ProFTPD before 1.3.10rc1 allows remote attackers to execute arbitrary code via a username, in     scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows     commands (e.g., COPY TO PROGRAM).(CVE-2026-42167)

Tenable has extracted the preceding description block directly from the EulerOS proftpd security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in
    contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain
    name that is accessed in a reverse DNS lookup. When "UseReverseDNS on" is enabled, the attacker-supplied
    hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect
    exploitability. (CVE-2026-44331)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4ddb108952 advisory.

    This update contains an updated `mod_wrap2_sql` that addresses a potential SQL injection issue when     connected to from a client with a maliciously-constructed reverse DNS record (CVE-2026-44331). Note that     `mod_wrap2_sql` is not enabled by default and the issue can only happen if `UseReverseDNS` is enabled,     which is also off by default.



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-871243b391 advisory.

    This update contains an updated `mod_wrap2_sql` that addresses a potential SQL injection issue when     connected to from a client with a maliciously-constructed reverse DNS record (CVE-2026-44331). Note that     `mod_wrap2_sql` is not enabled by default and the issue can only happen if `UseReverseDNS` is enabled,     which is also off by default.



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c8173d7dcd advisory.

    Automatic update for proftpd-1.3.9a-2.fc45.

    ##### **Changelog**

    ```
    * Mon May 11 2026 Paul Howarth <paul@city-fan.org> - 1.3.9a-2
    - Additional escaping for avoidance of SQL injection issues with %{note:...}       and %{env:...}; these are on top of the existing fix for CVE-2026-42167 in       1.3.9a
    - Fix for SQL Injection in mod_wrap2_sql via reverse DNS hostname       (CVE-2026-44331, rhbz#2466899, https://github.com/proftpd/proftpd/issues/2057)

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in     contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain     name that is accessed in a reverse DNS lookup. When UseReverseDNS on is enabled, the attacker-supplied     hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect     exploitability. (CVE-2026-44331)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
333481	EulerOS 2.0 SP11 : proftpd (EulerOS-SA-2026-3088)	Nessus	Huawei Local Security Checks	Local	high
333465	EulerOS 2.0 SP11 : proftpd (EulerOS-SA-2026-3142)	Nessus	Huawei Local Security Checks	Local	high
332966	EulerOS 2.0 SP13 : proftpd (EulerOS-SA-2026-2988)	Nessus	Huawei Local Security Checks	Local	high
332931	EulerOS 2.0 SP13 : proftpd (EulerOS-SA-2026-3038)	Nessus	Huawei Local Security Checks	Local	high
332907	EulerOS 2.0 SP15 : proftpd (EulerOS-SA-2026-2941)	Nessus	Huawei Local Security Checks	Local	high
332886	EulerOS 2.0 SP15 : proftpd (EulerOS-SA-2026-2900)	Nessus	Huawei Local Security Checks	Local	high
442595	Alpine: multiple proftpd packages: security update to 1.3.9b-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
442595	Alpine: multiple proftpd packages: security update to 1.3.9b-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
315980	Fedora 43 : proftpd (2026-4ddb108952)	Nessus	Fedora Local Security Checks	Local	high
315973	Fedora 44 : proftpd (2026-871243b391)	Nessus	Fedora Local Security Checks	Local	high
314304	Fedora 45 : proftpd (2026-c8173d7dcd)	Nessus	Fedora Local Security Checks	Local	high
312625	Linux Distros Unpatched Vulnerability : CVE-2026-44331	Nessus	Misc.	Local	high

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