Latest Snort Upgrade error in library engine

phantonuser

Hi All,

I did the latest snort upgrade and I am getting this error:

FATAL ERROR: The dynamic detection library "/usr/local/lib/snort_dynamicrules/server-webapp.so" version 1.0 compiled with dynamic engine library version 2.4 isn't compatible with the current dynamic engine library "/usr/local/lib/snort_dynamicengine/libsf_engine.so" version 2.6.

Snort does not start.

Does anyone having the same issue or know how to fix it?

I have looked in the forum and did not see any discussion about this. If I have missed something sorry.

Thanks.

bmeeks

Try completely removing the Snort package and then install it again. If you have "save settings" checked on the GLOBAL SETTINGS tab, you won't lose any configuration. Sounds like during the update your dynamic pre-compiled rules did not get updated. That is usually the cause of these kinds of errors.

Another thing you can try first is to force a rules update using the Force Update button on the UPDATES tab. That should bring down the new version of the rules.

Bill

phantonuser

Hi Bmeeks,

Thanks for the response.

I had already tried that but i did it again like you suggested. Rebooted the system, removed snort, rebooted again and installed snort again and I am still getting the same error.

Can you give another suggestion? Something that I may be missing or not doing.

Thank you.

battles

As I mentioned in another post, it installed correctly for me. This is my system:

2.3.1-RELEASE-p5 (i386)
built on Thu Jun 16 12:53:31 CDT 2016
FreeBSD 10.3-RELEASE-p3

Services
Service Description Status Actions
dhcpd DHCP Service Running
dpinger Gateway Monitoring Daemon Running
ntpd NTP clock sync Running
snort Snort IDS/IPS Daemon Running
sshd Secure Shell Daemon Running
unbound DNS Resolver Running

Installed Packages
Name Category Version
Cron sysutils 0.3.6_2
snort security 3.2.9.1_14
Dependencies: barnyard2-1.13 snort-2.9.8.3
System_Patches sysutils 1.1.4_1

bmeeks

@phantonuser:

Hi Bmeeks,

Thanks for the response.

I had already tried that but i did it again like you suggested. Rebooted the system, removed snort, rebooted again and installed snort again and I am still getting the same error.

Can you give another suggestion? Something that I may be missing or not doing.

Thank you.

Is server-webapp the only shared object rules you have enabled, or are there others enabled? Might be a problem with just that rule set (but I sort of doubt that). I don't have any public facing web servers in my network, so I don't have that rule set enabled.

Bill

phantonuser

Hi Everyone,

I have tried removing everything and doing a fresh install of Snort and I am still getting the same error and some different ones now.

I will try doing a fresh install of Pfsense later. For now I will continue using it without snort. Everything else seems to be working fine.

Thanks for all your help.

bmeeks

I just tested enabling that shared object rule set in a virtual machine and had no issues. Are you by chance running a NanoBSD version of pfSense?

Bill

ProxyMoron

Hi,
I have also just upgraded and have exactly the same error - however i dug a bit further and noticed this in the logs for a forced update in the update tab which fails to download the Snort VRT rules:-

Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Expected File MD5:
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Downloaded File MD5: fcf6bf610e0f417ae97bb9efd30e73c2
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Snort VRT rules file download failed. Bad MD5 checksum…
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Snort VRT rules file update downloaded successfully

It appears to not be downloading the MD5 for the ruleset correctly and matching on a blank MD5 - any suggestions?

morreale

same issue…subscribing

lutel

Same issue here

Paint

same issue.

bmeeks

@ProxyMoron:

Hi,
I have also just upgraded and have exactly the same error - however i dug a bit further and noticed this in the logs for a forced update in the update tab which fails to download the Snort VRT rules:-

Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Expected File MD5:
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Downloaded File MD5: fcf6bf610e0f417ae97bb9efd30e73c2
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Snort VRT rules file download failed. Bad MD5 checksum…
Jul 11 22:17:56 php-cgi snort_check_for_rule_updates.php: [Snort] Snort VRT rules file update downloaded successfully

It appears to not be downloading the MD5 for the ruleset correctly and matching on a blank MD5 - any suggestions?

This is not a Snort package problem. The Snort VRT rules checksum file posted is not formatted correctly. The VRT guys should get it sorted out soon.

Bill

ProxyMoron

Just forced an update and it seems to be working now.

morreale

@morreale:

same issue…subscribing

just to clarify…i am having the same issue as the OP not the VRT issue. I have actually disabled all rulesets.

Jul 12 11:41:26	snort	80512	FATAL ERROR: The dynamic detection library "/usr/local/lib/snort_dynamicrules/server-webapp.so" version 1.0 compiled with dynamic engine library version 2.4 isn't compatible with the current dynamic engine library "/usr/local/lib/snort_dynamicengine/libsf_engine.so" version 2.6.

ProxyMoron

@morreale:

@morreale:

same issue…subscribing

just to clarify…i am having the same issue as the OP not the VRT issue. I have actually disabled all rulesets.
Jul 12 11:41:26	snort	80512	FATAL ERROR: The dynamic detection library "/usr/local/lib/snort_dynamicrules/server-webapp.so" version 1.0 compiled with dynamic engine library version 2.4 isn't compatible with the current dynamic engine library "/usr/local/lib/snort_dynamicengine/libsf_engine.so" version 2.6.

Hi,
Just so you know i had exactly that issue as well after i updated to the latest version of Snort. However, after i searched the forum i saw people suggest that i force update the ruleset to resolve that issue,. This I did but then noticed the issue above.

However, now, forcing the update has resolved both issues so you may want to try that.

morreale

thanks for the suggestions but the error still exists and snort does not start. if no one is having this issue i will reinstall / reconfigure but it was working before.

bmeeks

@morreale:

thanks for the suggestions but the error still exists and snort does not start. if no one is having this issue i will reinstall / reconfigure but it was working before.

If you have the "mismatched library version" error, that means your disk structure still contains files from the 2.9.8.0 rule set. It should get cleared out and fixed if you force a rule download on the UPDATES tab. If not, you can remove the Snort package using the DELETE icon on the Package Manager page and the reinstall Snort from scratch.

Bill

morreale

@bmeeks:

@morreale:

thanks for the suggestions but the error still exists and snort does not start. if no one is having this issue i will reinstall / reconfigure but it was working before.

If you have the "mismatched library version" error, that means your disk structure still contains files from the 2.9.8.0 rule set. It should get cleared out and fixed if you force a rule download on the UPDATES tab. If not, you can remove the Snort package using the DELETE icon on the Package Manager page and the reinstall Snort from scratch.

Bill

i have done a force update 5 times. i will do a delete and reinstall.

morreale

@bmeeks:

@morreale:

thanks for the suggestions but the error still exists and snort does not start. if no one is having this issue i will reinstall / reconfigure but it was working before.

If you have the "mismatched library version" error, that means your disk structure still contains files from the 2.9.8.0 rule set. It should get cleared out and fixed if you force a rule download on the UPDATES tab. If not, you can remove the Snort package using the DELETE icon on the Package Manager page and the reinstall Snort from scratch.

Bill

still will not start

FATAL ERROR: The dynamic detection library "/usr/local/lib/snort_dynamicrules/server-webapp.so" version 1.0 compiled with dynamic engine library version 2.4 isn't compatible with the current dynamic engine library "/usr/local/lib/snort_dynamicengine/libsf_engine.so" version 2.6.

same error.

do i need to restart server after uninstall before reinstall?

bmeeks

@morreale:

@bmeeks:

@morreale:

thanks for the suggestions but the error still exists and snort does not start. if no one is having this issue i will reinstall / reconfigure but it was working before.

If you have the "mismatched library version" error, that means your disk structure still contains files from the 2.9.8.0 rule set. It should get cleared out and fixed if you force a rule download on the UPDATES tab. If not, you can remove the Snort package using the DELETE icon on the Package Manager page and the reinstall Snort from scratch.

Bill

still will not start
FATAL ERROR: The dynamic detection library "/usr/local/lib/snort_dynamicrules/server-webapp.so" version 1.0 compiled with dynamic engine library version 2.4 isn't compatible with the current dynamic engine library "/usr/local/lib/snort_dynamicengine/libsf_engine.so" version 2.6.
same error.

do i need to restart server after uninstall before reinstall?

Try this brute force approach. Manually delete the /usr/local/lib/snort_dynamicengine directory and all files in it, then force a rules update. Or for an even more radical approach, remove the Snort package again, open a shell command line session and delete all the snort directories you see in /usr/local/lib, then reinstall Snort.

I may have asked you already, and if so forgive me for asking again, but are you by chance running this on NanoBSD? For some reason your old Snort version shared object rules are not getting removed and overwritten with the new version during updates from the new Snort 2.9.8.3 package. Shared object rules are pre-compiled and tagged with specific version numbers that tie them to the Snort binary. Each time the binary updates, the shared object rules get a new version number. The error message is telling us that you have a version mismatch between the Snort binary and the installed shared object pre-compiled rules.

Bill