FreeBSD : bro -- array bounds and potential DOS issues (d0be41fe-2a20-4633-b057-4e8b25c41780)

High Nessus Plugin ID 112187

Synopsis

The remote FreeBSD host is missing a security-related update.

Description

Corelight reports :

Bro 2.5.5 primarily addresses security issues :

- Fix array bounds checking in BinPAC: for arrays that are fields within a record, the bounds check was based on a pointer to the start of the record rather than the start of the array field, potentially resulting in a buffer over-read.

- Fix SMTP command string comparisons: the number of bytes compared was based on the user-supplied string length and can lead to incorrect matches. e.g. giving a command of 'X' incorrectly matched 'X-ANONYMOUSTLS' (and an empty commands match anything).

Address potential vectors for Denial of Service :

- 'Weird' events are now generally suppressed/sampled by default according to some tunable parameters.

- Improved handling of empty lines in several text protocol analyzers that can cause performance issues when seen in long sequences.

- Add `smtp_excessive_pending_cmds' weird which serves as a notification for when the 'pending command' queue has reached an upper limit and been cleared to prevent one from attempting to slowly exhaust memory.

Solution

Update the affected package.

See Also

https://www.bro.org/download/NEWS.bro.html

http://www.nessus.org/u?badd76d2

Plugin Details

Severity: High

ID: 112187

File Name: freebsd_pkg_d0be41fe2a204633b0574e8b25c41780.nasl

Version: 1.2

Type: local

Published: 2018/08/30

Modified: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:bro, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2018/08/29

Vulnerability Publication Date: 2018/08/28