Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Database Security
Authentication
Mobile
Privacy
Compliance
Careers and People
Identity & Access Management
Security Monitoring
Advanced Threats
Insider Threats
Vulnerability Management
Comments
Shellshocked: A Future Of ‘Hair On Fire’ Bugs
Newest First  |  Oldest First  |  Threaded View
Page 1 / 3   >   >>
rjones2818
rjones2818,
 User Rank: Strategist
9/30/2014 | 11:03:40 AM
Re: hair-on-fire bug fatigue
Two things:


1) Simplify as much as possible, as has been mentioned in the comments. This is particularly true in the entrance to any programs.  The fewer doors, the fewer ways for the rats to get in.  I know it's a broad brush, but complexity for its own sake is unsafe.  The likelyhood is that every system is probably unsafe due to designers not thinking of every way their code is going to be attacked.  This isn't because they're bad designers, it's because not every way code is going to be attacked has been thought of by anybody yet.


2) The people who aren't patching aren't fatigued.  Regular patchers shouldn't be fatigued, it's just part of what they do. People who patch absolutly everything the moment a patch comes out probably are fatigued.
Kelly Jackson Higgins
Kelly Jackson Higgins,
 User Rank: Strategist
9/29/2014 | 2:01:41 PM
Re: if you patched over the weekend, you're out of date, and vulnerable, again.
This is great insight and perspective, Paul. Many thanks.
paulvixie
paulvixie,
 User Rank: Author
9/29/2014 | 1:51:04 PM
Re: if you patched over the weekend, you're out of date, and vulnerable, again.
<< These appear to be different bugs, unless I'm missing something? >>

To me the bug is that GNU Bash ever evals the contents of an environment variable. In other words, all of this week's drama comes from a misfeature. Based on the fix now present on FreeBSD systems, I am not the only one thinking this way. However, the maintainers of GNU Bash are doing their darndest to make this feature safe by making terribly fine distinctions about the exact form, syntax, and content of these environment variables. The reason you see five different CVE's (as of this moment) at http://shellshocked.net/ is that people keep finding new ways to fool the latest patch and access the underlying remote execution vulnerability.

I prefer FreeBSD's fix. Don't evaluate the contents of environment variables by default. To those who warn that this will break some existing GNU Bash scripts, I answer: yes, and that's a bitter pill, but since this is actually misfeature, my feeling is that adding logic to make finer and finer distinctions about the content of environment variables is increasing complexity (and therefore danger), and decreasing auditability and provability (and therefore safety).

I also prefer the Debian approach (/bin/sh is "dash" not "bash") over RedHat and Apple's. GNU Bash is a great interactive shell, but it's way too large and too complex to be allowed to be in the execution path for libc's popen() and system() calls, which are used by Apache and QMail to run commands. /bin/sh should be as simple as possible, which is to say, like "dash" on Debian (which comes from "ash" which is used as /bin/sh on FreeBSD, NetBSD, OpenBSD, and DragonflyBSD).

It's very strange after the last couple of years of hair-on-fire bug-of-the-week theater, to have to argue that complexity ought to be avoided wherever possible in control systems.
Kelly Jackson Higgins
Kelly Jackson Higgins,
 User Rank: Strategist
9/29/2014 | 12:59:58 PM
Re: if you patched over the weekend, you're out of date, and vulnerable, again.
@Paul--A bit of confusion here on the vulns Shellshocker is talking about and what SANS ISC has posted: https://isc.sans.edu/diary/Shellshock%3A+We+are+not+done+yet+CVE-2014-6277%2C+CVE-2014-6278/18723. These appear to be different bugs, unless I'm missing something? 
SgS125
SgS125,
 User Rank: Ninja
9/29/2014 | 11:22:35 AM
You sound tired Paul
Yup another week, another lip gets bit, we wonder, we wring our hands and guess what, the dang thing was there last week.  We did not know it was there last week, at least most of us anyway.

Time to double down on your game and get to it.

Just think of all the great exploits that we still don;t know about, always work to be done here.

It's like we are the gravediggers and everyone is in their 90's..... only a matter of time till we need to dig another hole.

 
Robert McDougal
Robert McDougal,
 User Rank: Ninja
9/29/2014 | 10:39:35 AM
Re: Great analysis but is it really so hopeless?
As with any security problem I am only as confident with regards to the intel I have available.  Based on the exploits that are currently known to be in the wild I am very confident that I am able to detect them all.  However, if there is an attack that is drastically different than those I am tracking then they could slip under my radar.

With that said, based off the nature of this vulnerability I am fairly confident that we are seeing everything that is heading our way and the attacks that are directed at us are not getting through.
Marilyn Cohodas
Marilyn Cohodas,
 User Rank: Strategist
9/29/2014 | 10:28:40 AM
Re: Great analysis but is it really so hopeless?
That sounds like a good thing @Robert McDougal (that you've patched and also have seen only 40 attempted attacks). Are you confident that your patched all the holes and that your information is correct?
Robert McDougal
Robert McDougal,
 User Rank: Ninja
9/29/2014 | 10:05:05 AM
Re: Great analysis but is it really so hopeless?
So far our org has patched everything that can be patched.  However, we are also not seeing very many attack attempts either.  Since we deployed our Shellshock IDS alerts we have only seen around 40 attempted attacks.
aws0513
aws0513,
 User Rank: Ninja
9/29/2014 | 9:46:16 AM
Re: Great analysis but is it really so hopeless?
Yep, we caught that info yesterday. We got caught up on our key systems accordingly.
Monitoring for further info as we go.

Thanks for the follow up info @Paul.
RyanSepe
RyanSepe,
 User Rank: Ninja
9/29/2014 | 9:42:09 AM
Re: if you patched over the weekend, you're out of date, and vulnerable, again.
I agree @Kelly. We need to define a better means of communciation for not only this vulnerability but all vulnerabilities. I would imagine that corporate security teams are in many conversations with their MSSP's if they have them available but for ones that don't they are relying much on this information outlet.

What have people felt are the best avenues for consistent and validated data regarding this vulnerability?
Page 1 / 3   >   >>


Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Black Hat USA 2022 Attendee Report
Black Hat attendees are not sleeping well. Between concerns about attacks against cloud services, ransomware, and the growing risks to the global supply chain, these security pros have a lot to be worried about. Read our 2022 report to hear what they're concerned about now.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2022-37041
PUBLISHED: 2022-08-12
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. The value of the X-Forwarded-Host header overwrites the value of the Host header in proxied requests. The value of X-Forwarded-Host header is not checked against the whitelist of ho...
CVE-2022-37042
PUBLISHED: 2022-08-12
Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execu...
CVE-2022-37043
PUBLISHED: 2022-08-12
An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. When using preauth, CSRF tokens are not checked on some POST endpoints. Thus, when an authenticated user views an attacker-controlled page, a request will be sent to the application that appears to b...
CVE-2022-37044
PUBLISHED: 2022-08-12
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/search?action accepts parameters called extra, title, and onload that are partially sanitised and lead to reflected XSS that allows executing arbitrary JavaScript on the victim's machine.
CVE-2022-37423
PUBLISHED: 2022-08-12
Neo4j APOC (Awesome Procedures on Cypher) before 4.3.0.7 and 4.x before 4.4.0.8 allows Directory Traversal to sibling directories via apoc.log.stream.