Disclaimer

The content of this blog is my personal opinion only. Although I am an employee - currently of Imagination Technologies's MIPS group, in the past of other companies such as Intellectual Ventures, Intel, AMD, Motorola, and Gould - I reveal this only so that the reader may account for any possible bias I may have towards my employer's products. The statements I make here in no way represent my employer's position, nor am I authorized to speak on behalf of my employer. In fact, this posting may not even represent my personal opinion, since occasionally I play devil's advocate.

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Monday, July 04, 2011

Mitre Top 25 SW bugs

http://cwe.mitre.org/top25/index.html

Rank Score ID Name
[1] 93.8 CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
[2] 83.3 CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

-- the top two are handled by taint propagation. "Improper Neutralization" => "quotification"



[3] 79.0 CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

-- handled by stuff like Milo Martin's Hardbound and Softbound.


[4] 77.7 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

-- tainting/quotification

[5] 76.9 CWE-306 Missing Authentication for Critical Function
[6] 76.8 CWE-862 Missing Authorization

-- more like real SW bugs, with no crutches like bounds checks of tainting.

-- except that we can imagine that capability systems might help here - it might be made mandatory to activate some capabilities positively, rather than passively inheriting them.

[7] 75.0 CWE-798 Use of Hard-coded Credentials
[8] 75.0 CWE-311 Missing Encryption of Sensitive Data


[9] 74.0 CWE-434 Unrestricted Upload of File with Dangerous Type

-- while we might hope that a capability system might upload such a file but strip it of all ability to do harm, experience suggests that a user will just blindly give the file whatever privileges it asks for.

[10] 73.8 CWE-807 Reliance on Untrusted Inputs in a Security Decision

-- tainiting

[11] 73.1 CWE-250 Execution with Unnecessary Privileges

-- capability systems are supposed to make it easier to implement the "Principle of Least Privilege".  However, it still happens.

-- we can imagine security tools that profile privileges - that determine what privileges have never been used, to allow narrowing the privileges as much as possible.

[12] 70.1 CWE-352 Cross-Site Request Forgery (CSRF)

-- tainting, capabilities


[13] 69.3 CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
[14] 68.5 CWE-494 Download of Code Without Integrity Check
[15] 67.8 CWE-863 Incorrect Authorization

[16] 66.0 CWE-829 Inclusion of Functionality from Untrusted Control Sphere

-- tainting


[17] 65.5 CWE-732 Incorrect Permission Assignment for Critical Resource
[18] 64.6 CWE-676 Use of Potentially Dangerous Function
[19] 64.1 CWE-327 Use of a Broken or Risky Cryptographic Algorithm

[20] 62.4 CWE-131 Incorrect Calculation of Buffer Size

-- classic buffer overflow, such as Martin Hardbound/Softbound.

[21] 61.5 CWE-307 Improper Restriction of Excessive Authentication Attempts
[22] 61.1 CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

[23] 61.0 CWE-134 Uncontrolled Format String
[24] 60.3 CWE-190 Integer Overflow or Wraparound

-- these two, 23 and 24, are somewhat handled by buffer overflow checking as in Hardbound and Softbound - the security flaws with integer overflow often manifest themselves as unchecked buffer overflows.

-- however, they can manifest themselves in other ways as well.


[25] 59.9 CWE-759 Use of a One-Way Hash without a Salt