Challenge Information - KPRCA_00119

Commonly known as: Azurad

Rounds Enabled

19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33

Details

Original Versions

Known Vulnerabilities

  • CWE-680 - Integer Overflow to Buffer Overflow
    • CWEs are listed as indicated by the challenge author.

Deployed patches

Deployed IDS rules

DARPA performer group

Kaprica Security (KPRCA)

Description

A custom language interpreter implementing a simple calculator service. The service lets a user insert and retrieve numbers, perform arithmetic on the numbers, and access a RNG.

Feature List

While the service is very simple, the language it is implemented in is very featureful. The language includes support for dynamic types, arrays, while loops, conditionals, scoping, and procedures. The library can be easily extended by adding additional external functions written in C, or by creating whole new types similiar to the current array support.

Current library functions:

  • chr
  • ord
  • rand
  • read
  • echo

Vulnerability

Vuln 1

In Array::set and Array::get, the library does not properly handle INT32_MIN (0x80000000). This results in some integer overflows which will lead to a trivial heap overflow.

In the POV, we utilize the bug in Array::set to cause the allocated buffer to be small but the number of allocated items to be large. Then we use Array::get to read the password variable that is on the heap. This results in a type 2 exploit.

Generic class of vulnerability

Heap Corruption

CWE classification

CWE-680: Integer Overflow to Buffer Overflow

Challenges

  • The primary challenge is naturally the interpreted language, since it obscures the control flow of the service
  • Actual exploitation of the bug is difficult because of the very limited control of memory; though this is easier if relying on stack addresses and WX-stack

Difficulty

  • Discovery: medium
  • Proving: medium
  • Patching: medium

POV Information

Round Source Destination Result POV Analysis Video
20 CSDS Disekt Failed POV POV Watch
20 CSDS ForAllSecure Failed POV POV Watch
20 CSDS Shellphish Failed POV POV Watch
20 CSDS TECHx Failed POV POV Watch
20 DeepRed CodeJitsu Failed POV POV Watch
20 DeepRed CSDS Failed POV POV Watch
20 DeepRed Disekt Failed POV POV Watch
20 DeepRed ForAllSecure Failed POV POV Watch
20 DeepRed Shellphish Failed POV POV Watch
20 DeepRed TECHx Failed POV POV Watch
20 ForAllSecure CodeJitsu Failed POV POV Watch
20 ForAllSecure CSDS Failed POV POV Watch
20 ForAllSecure DeepRed Failed POV POV Watch
20 ForAllSecure Disekt Failed POV POV Watch
20 ForAllSecure Shellphish Failed POV POV Watch
20 ForAllSecure TECHx Failed POV POV Watch
21 CSDS CodeJitsu Failed POV through defenses POV
21 CSDS DeepRed Failed POV POV Watch
21 CSDS Disekt Failed POV POV Watch
21 CSDS ForAllSecure Failed POV POV Watch
21 CSDS Shellphish Failed POV POV Watch
21 CSDS TECHx Failed POV POV Watch
21 DeepRed CodeJitsu Failed POV through defenses POV
21 DeepRed CSDS Failed POV POV Watch
21 DeepRed Disekt Failed POV POV Watch
21 DeepRed ForAllSecure Failed POV POV Watch
21 DeepRed Shellphish Failed POV POV Watch
21 DeepRed TECHx Failed POV POV Watch
21 ForAllSecure CodeJitsu Failed POV through defenses POV
21 ForAllSecure CSDS Failed POV POV Watch
21 ForAllSecure DeepRed Failed POV POV Watch
21 ForAllSecure Disekt Failed POV POV Watch
21 ForAllSecure Shellphish Failed POV POV Watch
21 ForAllSecure TECHx Failed POV POV Watch
22 CodeJitsu Shellphish Failed POV through defenses POV Watch
22 CSDS CodeJitsu Failed POV through defenses POV
22 CSDS DeepRed Failed POV POV Watch
22 CSDS Disekt Failed POV POV Watch
22 CSDS ForAllSecure Failed POV POV Watch
22 CSDS Shellphish Failed POV through defenses POV Watch
22 CSDS TECHx Failed POV POV Watch
22 DeepRed CodeJitsu Failed POV through defenses POV
22 DeepRed CSDS Failed POV POV Watch
22 DeepRed Disekt Failed POV POV Watch
22 DeepRed ForAllSecure Failed POV POV Watch
22 DeepRed Shellphish Failed POV through defenses POV Watch
22 DeepRed TECHx Failed POV POV Watch
22 ForAllSecure CodeJitsu Failed POV through defenses POV
22 ForAllSecure CSDS Failed POV POV Watch
22 ForAllSecure DeepRed Failed POV POV Watch
22 ForAllSecure Disekt Failed POV POV Watch
22 ForAllSecure Shellphish Failed POV through defenses POV Watch
22 ForAllSecure TECHx Failed POV POV Watch
23 CSDS CodeJitsu Failed POV through defenses POV
23 CSDS DeepRed Failed POV POV Watch
23 CSDS Disekt Failed POV POV Watch
23 CSDS ForAllSecure Failed POV POV Watch
23 CSDS Shellphish Failed POV through defenses POV Watch
23 CSDS TECHx Failed POV POV Watch
23 DeepRed CodeJitsu Failed POV through defenses POV
23 DeepRed CSDS Failed POV POV Watch
23 DeepRed Disekt Failed POV POV Watch
23 DeepRed ForAllSecure Failed POV POV Watch
23 DeepRed Shellphish Failed POV through defenses POV Watch
23 DeepRed TECHx Failed POV POV Watch
23 ForAllSecure CodeJitsu Failed POV through defenses POV
23 ForAllSecure CSDS Failed POV POV Watch
23 ForAllSecure DeepRed Failed POV POV Watch
23 ForAllSecure Disekt Failed POV POV Watch
23 ForAllSecure Shellphish Failed POV through defenses POV Watch
23 ForAllSecure TECHx Failed POV POV Watch
24 CSDS CodeJitsu Failed POV through defenses POV
24 CSDS DeepRed Failed POV POV Watch
24 CSDS Disekt Failed POV POV Watch
24 CSDS ForAllSecure Failed POV POV Watch
24 CSDS Shellphish Failed POV through defenses POV Watch
24 CSDS TECHx Failed POV POV Watch
24 DeepRed CodeJitsu Failed POV through defenses POV
24 DeepRed CSDS Failed POV POV Watch
24 DeepRed Disekt Failed POV POV Watch
24 DeepRed ForAllSecure Failed POV POV Watch
24 DeepRed Shellphish Failed POV through defenses POV Watch
24 DeepRed TECHx Failed POV POV Watch
24 ForAllSecure CodeJitsu Failed POV through defenses POV
24 ForAllSecure CSDS Failed POV POV Watch
24 ForAllSecure DeepRed Failed POV POV Watch
24 ForAllSecure Disekt Failed POV POV Watch
24 ForAllSecure Shellphish Failed POV through defenses POV Watch
24 ForAllSecure TECHx Failed POV POV Watch
25 CSDS CodeJitsu Failed POV through defenses POV
25 CSDS DeepRed Failed POV POV Watch
25 CSDS Disekt Failed POV POV Watch
25 CSDS ForAllSecure Failed POV POV Watch
25 CSDS Shellphish Failed POV through defenses POV Watch
25 CSDS TECHx Failed POV POV Watch
25 DeepRed CodeJitsu Failed POV through defenses POV
25 DeepRed CSDS Failed POV POV Watch
25 DeepRed Disekt Failed POV POV Watch
25 DeepRed ForAllSecure Failed POV POV Watch
25 DeepRed Shellphish Failed POV through defenses POV Watch
25 DeepRed TECHx Failed POV POV Watch
25 ForAllSecure CodeJitsu Failed POV through defenses POV
25 ForAllSecure CSDS Failed POV POV Watch
25 ForAllSecure DeepRed Failed POV POV Watch
25 ForAllSecure Disekt Failed POV POV Watch
25 ForAllSecure Shellphish Failed POV through defenses POV Watch
25 ForAllSecure TECHx Failed POV POV Watch
26 CSDS CodeJitsu Failed POV through defenses POV
26 CSDS DeepRed Failed POV POV Watch
26 CSDS Disekt Failed POV POV Watch
26 CSDS ForAllSecure Failed POV POV Watch
26 CSDS Shellphish Failed POV through defenses POV Watch
26 CSDS TECHx Failed POV POV Watch
26 DeepRed CodeJitsu Failed POV through defenses POV
26 DeepRed CSDS Failed POV POV Watch
26 DeepRed Disekt Failed POV POV Watch
26 DeepRed ForAllSecure Failed POV POV Watch
26 DeepRed Shellphish Failed POV through defenses POV Watch
26 DeepRed TECHx Failed POV POV Watch
26 ForAllSecure CodeJitsu Failed POV through defenses POV
26 ForAllSecure CSDS Failed POV POV Watch
26 ForAllSecure DeepRed Failed POV POV Watch
26 ForAllSecure Disekt Failed POV POV Watch
26 ForAllSecure Shellphish Failed POV through defenses POV Watch
26 ForAllSecure TECHx Failed POV POV Watch
27 CSDS CodeJitsu Failed POV through defenses POV
27 CSDS DeepRed Failed POV POV Watch
27 CSDS Disekt Failed POV POV Watch
27 CSDS ForAllSecure Failed POV POV Watch
27 CSDS Shellphish Failed POV through defenses POV Watch
27 CSDS TECHx Failed POV POV Watch
27 DeepRed CodeJitsu Failed POV through defenses POV
27 DeepRed CSDS Failed POV POV Watch
27 DeepRed Disekt Failed POV POV Watch
27 DeepRed ForAllSecure Failed POV POV Watch
27 DeepRed Shellphish Failed POV through defenses POV Watch
27 DeepRed TECHx Failed POV POV Watch
27 ForAllSecure CodeJitsu Failed POV through defenses POV
27 ForAllSecure CSDS Failed POV POV Watch
27 ForAllSecure DeepRed Failed POV POV Watch
27 ForAllSecure Disekt Failed POV POV Watch
27 ForAllSecure Shellphish Failed POV through defenses POV Watch
27 ForAllSecure TECHx Failed POV POV Watch
28 CSDS CodeJitsu Failed POV through defenses POV
28 CSDS DeepRed Failed POV POV Watch
28 CSDS Disekt Failed POV POV Watch
28 CSDS ForAllSecure Failed POV POV Watch
28 CSDS Shellphish Failed POV through defenses POV Watch
28 CSDS TECHx Failed POV POV Watch
28 DeepRed CodeJitsu Failed POV through defenses POV
28 DeepRed CSDS Failed POV POV Watch
28 DeepRed Disekt Failed POV POV Watch
28 DeepRed ForAllSecure Failed POV POV Watch
28 DeepRed Shellphish Failed POV through defenses POV Watch
28 DeepRed TECHx Failed POV POV Watch
28 ForAllSecure CodeJitsu Failed POV through defenses POV
28 ForAllSecure CSDS Failed POV POV Watch
28 ForAllSecure DeepRed Failed POV POV Watch
28 ForAllSecure Disekt Failed POV POV Watch
28 ForAllSecure Shellphish Failed POV through defenses POV Watch
28 ForAllSecure TECHx Failed POV POV Watch
29 CSDS CodeJitsu Failed POV through defenses POV
29 CSDS Disekt Failed POV POV Watch
29 CSDS ForAllSecure Failed POV POV Watch
29 CSDS Shellphish Failed POV through defenses POV Watch
29 CSDS TECHx Failed POV POV Watch
29 DeepRed CodeJitsu Failed POV through defenses POV
29 DeepRed CSDS Failed POV POV Watch
29 DeepRed Disekt Failed POV POV Watch
29 DeepRed ForAllSecure Failed POV POV Watch
29 DeepRed Shellphish Failed POV through defenses POV Watch
29 DeepRed TECHx Failed POV POV Watch
29 ForAllSecure CodeJitsu Failed POV through defenses POV
29 ForAllSecure CSDS Failed POV POV Watch
29 ForAllSecure Disekt Failed POV POV Watch
29 ForAllSecure Shellphish Failed POV through defenses POV Watch
29 ForAllSecure TECHx Failed POV POV Watch
30 CSDS CodeJitsu Failed POV POV Watch
30 CSDS DeepRed Failed POV through defenses POV Watch
30 CSDS Disekt Failed POV POV Watch
30 CSDS ForAllSecure Failed POV POV Watch
30 CSDS Shellphish Failed POV through defenses POV Watch
30 CSDS TECHx Failed POV POV Watch
30 DeepRed CodeJitsu Failed POV POV Watch
30 DeepRed CSDS Failed POV POV Watch
30 DeepRed Disekt Failed POV POV Watch
30 DeepRed ForAllSecure Failed POV POV Watch
30 DeepRed Shellphish Failed POV through defenses POV Watch
30 DeepRed TECHx Failed POV POV Watch
30 ForAllSecure CodeJitsu Failed POV POV Watch
30 ForAllSecure CSDS Failed POV POV Watch
30 ForAllSecure DeepRed Failed POV through defenses POV Watch
30 ForAllSecure Disekt Failed POV POV Watch
30 ForAllSecure Shellphish Failed POV through defenses POV Watch
30 ForAllSecure TECHx Failed POV POV Watch
31 CSDS CodeJitsu Failed POV through defenses POV
31 CSDS DeepRed Failed POV through defenses POV Watch
31 CSDS Disekt Failed POV POV Watch
31 CSDS ForAllSecure Failed POV POV Watch
31 CSDS Shellphish Failed POV through defenses POV Watch
31 CSDS TECHx Failed POV POV Watch
31 DeepRed CodeJitsu Failed POV through defenses POV
31 DeepRed CSDS Failed POV POV Watch
31 DeepRed Disekt Failed POV POV Watch
31 DeepRed ForAllSecure Failed POV POV Watch
31 DeepRed Shellphish Failed POV through defenses POV Watch
31 DeepRed TECHx Failed POV POV Watch
31 ForAllSecure CodeJitsu Failed POV through defenses POV
31 ForAllSecure CSDS Failed POV POV Watch
31 ForAllSecure DeepRed Failed POV through defenses POV Watch
31 ForAllSecure Disekt Failed POV POV Watch
31 ForAllSecure Shellphish Failed POV through defenses POV Watch
31 ForAllSecure TECHx Failed POV POV Watch
32 CSDS CodeJitsu Failed POV POV Watch
32 CSDS DeepRed Failed POV through defenses POV Watch
32 CSDS Disekt Failed POV POV Watch
32 CSDS ForAllSecure Failed POV POV Watch
32 CSDS Shellphish Failed POV through defenses POV Watch
32 CSDS TECHx Failed POV POV Watch
32 DeepRed CodeJitsu Failed POV POV Watch
32 DeepRed CSDS Failed POV POV Watch
32 DeepRed Disekt Failed POV POV Watch
32 DeepRed ForAllSecure Failed POV POV Watch
32 DeepRed Shellphish Failed POV through defenses POV Watch
32 DeepRed TECHx Failed POV POV Watch
32 ForAllSecure CodeJitsu Failed POV POV Watch
32 ForAllSecure CSDS Failed POV POV Watch
32 ForAllSecure DeepRed Failed POV through defenses POV Watch
32 ForAllSecure Disekt Failed POV POV Watch
32 ForAllSecure Shellphish Failed POV through defenses POV Watch
32 ForAllSecure TECHx Failed POV POV Watch
33 CodeJitsu Disekt Failed POV through defenses POV Watch
33 CSDS CodeJitsu Failed POV through defenses POV
33 CSDS DeepRed Failed POV through defenses POV Watch
33 CSDS Disekt Failed POV through defenses POV Watch
33 CSDS ForAllSecure Failed POV POV Watch
33 CSDS Shellphish Failed POV through defenses POV Watch
33 CSDS TECHx Failed POV POV Watch
33 DeepRed CodeJitsu Failed POV through defenses POV
33 DeepRed CSDS Failed POV POV Watch
33 DeepRed Disekt Failed POV through defenses POV Watch
33 DeepRed ForAllSecure Failed POV POV Watch
33 DeepRed Shellphish Failed POV through defenses POV Watch
33 DeepRed TECHx Failed POV POV Watch
33 ForAllSecure CodeJitsu Failed POV through defenses POV
33 ForAllSecure CSDS Failed POV POV Watch
33 ForAllSecure DeepRed Failed POV through defenses POV Watch
33 ForAllSecure Disekt Failed POV through defenses POV Watch
33 ForAllSecure Shellphish Failed POV through defenses POV Watch
33 ForAllSecure TECHx Failed POV POV Watch

Curated by Lunge Technology, LLC. Questions or comments? Send us email