CVE-2021-39228
Tremor memory corruption vulnerability
Description
Tremor is an event processing system for unstructured data. A vulnerability exists between versions 0.7.2 and 0.11.6. This vulnerability is a memory safety Issue when using `patch` or `merge` on `state` and assign the result back to `state`. In this case, affected versions of Tremor and the tremor-script crate maintains references to memory that might have been freed already. And these memory regions can be accessed by retrieving the `state`, e.g. send it over TCP or HTTP. This requires the Tremor server (or any other program using tremor-script) to execute a tremor-script script that uses the mentioned language construct. The issue has been patched in version 0.11.6 by removing the optimization and always cloning the target expression of a Merge or Patch. If an upgrade is not possible, a possible workaround is to avoid the optimization by introducing a temporary variable and not immediately reassigning to `state`.
INFO
Published Date :
Sept. 17, 2021, 2:15 p.m.
Last Modified :
Sept. 30, 2021, 7:02 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39228.
| URL | Resource |
|---|---|
| https://github.com/tremor-rs/tremor-runtime/commit/1a2efcdbe68e5e7fd0a05836ac32d2cde78a0b2e | Patch Third Party Advisory |
| https://github.com/tremor-rs/tremor-runtime/pull/1217 | Exploit Patch Third Party Advisory |
| https://github.com/tremor-rs/tremor-runtime/releases/tag/v0.11.6 | Release Notes Third Party Advisory |
| https://github.com/tremor-rs/tremor-runtime/security/advisories/GHSA-mc22-5q92-8v85 | Mitigation Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39228 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39228 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 30, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/tremor-rs/tremor-runtime/commit/1a2efcdbe68e5e7fd0a05836ac32d2cde78a0b2e No Types Assigned https://github.com/tremor-rs/tremor-runtime/commit/1a2efcdbe68e5e7fd0a05836ac32d2cde78a0b2e Patch, Third Party Advisory Changed Reference Type https://github.com/tremor-rs/tremor-runtime/pull/1217 No Types Assigned https://github.com/tremor-rs/tremor-runtime/pull/1217 Exploit, Patch, Third Party Advisory Changed Reference Type https://github.com/tremor-rs/tremor-runtime/releases/tag/v0.11.6 No Types Assigned https://github.com/tremor-rs/tremor-runtime/releases/tag/v0.11.6 Release Notes, Third Party Advisory Changed Reference Type https://github.com/tremor-rs/tremor-runtime/security/advisories/GHSA-mc22-5q92-8v85 No Types Assigned https://github.com/tremor-rs/tremor-runtime/security/advisories/GHSA-mc22-5q92-8v85 Mitigation, Third Party Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:tremor:*:*:*:*:*:*:*:* versions from (including) 0.7.2 up to (excluding) 0.11.6
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39228 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39228
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.31 }} 0.03%
score
0.70149
percentile