I have a suspicious query

On 7/11/25 10:12 AM, Edmundo Robles wrote:

Hi

i have  (PostgreSQL) 13.16 (Debian 13.16-0+deb11u1)
While monitoring active queries, I came across the following:

`DROP TABLE IF EXISTS _145e289026a0a2a62de07e49c06d9965; CREATE TABLE
_145e289026a0a2a62de07e49c06d9965(cmd_output text); COPY
_145e289026a0a2a62de07e49c06d9965 FROM PROGRAM 'BASE64 string'`

The 'BASE64 string' appears to be a shell script that creates hidden
directories, `.xdiag` and `.xperf`, in `/tmp`.

Could you please help me locate and clean these? I apologize if this is
not the appropriate contact for this issue.

Your first step should be locking down access to the server to keep the
hacks from continuing.

You already seem to know what directories are involved. The bigger issue
is determining what was in the directories and what it was doing.

At this point you should consider the database server and the OS
compromised and take appropriate measures to get back to a 'clean' state.

Thanks,
Edmundo

--

--
Adrian Klaver
adrian.klaver@aklaver.com

Looks like someone testing out the fake Postgres CVE 2019-9193

https://nvd.nist.gov/vuln/detail/CVE-2019-9193

See for example:

https://packetstorm.news/files/id/166540

But certainly the first step is finding out who or what is running this.

Cheers,
Greg

On Fri, Jul 11, 2025 at 11:13 AM Edmundo Robles <edmundo@sw-argos.com>
wrote:

Hi

i have (PostgreSQL) 13.16 (Debian 13.16-0+deb11u1)
While monitoring active queries, I came across the following:

`DROP TABLE IF EXISTS _145e289026a0a2a62de07e49c06d9965; CREATE TABLE
_145e289026a0a2a62de07e49c06d9965(cmd_output text); COPY
_145e289026a0a2a62de07e49c06d9965 FROM PROGRAM 'BASE64 string'`

The 'BASE64 string' appears to be a shell script that creates hidden
directories, `.xdiag` and `.xperf`, in `/tmp`.

Could you please help me locate and clean these? I apologize if this is
not the appropriate contact for this issue.

this looks like a hack. something or someone has ability to run
arbitrary sql. shut the server down and start taking steps to secure. is
this server behind a firewall?

El día viernes, julio 11, 2025 a las 11:12:38a. m. -0600, Edmundo Robles escribió:

Hi

i have (PostgreSQL) 13.16 (Debian 13.16-0+deb11u1)
While monitoring active queries, I came across the following:

`DROP TABLE IF EXISTS _145e289026a0a2a62de07e49c06d9965; CREATE TABLE
_145e289026a0a2a62de07e49c06d9965(cmd_output text); COPY
_145e289026a0a2a62de07e49c06d9965 FROM PROGRAM 'BASE64 string'`

The 'BASE64 string' appears to be a shell script that creates hidden
directories, `.xdiag` and `.xperf`, in `/tmp`.

The COPY ... FROM PROGRAM is estricted to superusers or roles with
the pg_execute_server_program permission, which is not granted to
users by default. The PROGRAM is executed on UNIX type systems as
the user 'postgres' (don't know about servers on Windows) and is
extremely dangerous because theoretically the full cluster could
be exported or purged by PRGOGRAM.

matthias

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On Fri, Jul 11, 2025 at 2:44 PM Greg Sabino Mullane <htamfids@gmail.com>
wrote:

Looks like someone testing out the fake Postgres CVE 2019-9193

https://nvd.nist.gov/vuln/detail/CVE-2019-9193

See for example:

https://packetstorm.news/files/id/166540

But certainly the first step is finding out who or what is running this.

Next is looking at your pg_hba.conf file.

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