7.5
HIGH
CVE-2022-39249
Matrix Javascript SDK Key Forgery Vulnerability
Description

Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.

INFO

Published Date :

Sept. 28, 2022, 8:15 p.m.

Last Modified :

Dec. 8, 2022, 3:13 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2022-39249 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Matrix javascript_sdk
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-2022-39249.

URL Resource
https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76 Patch Third Party Advisory
https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0 Release Notes Third Party Advisory
https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg Third Party Advisory
https://github.com/matrix-org/matrix-spec-proposals/pull/3061 Patch Third Party Advisory
https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients Vendor Advisory
https://security.gentoo.org/glsa/202210-35 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-2022-39249 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2022-39249 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.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Dec. 08, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202210-35 No Types Assigned https://security.gentoo.org/glsa/202210-35 Third Party Advisory
  • CVE Modified by [email protected]

    Oct. 31, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202210-35 [No Types Assigned]
  • Initial Analysis by [email protected]

    Sep. 30, 2022

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76 No Types Assigned https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76 Patch, Third Party Advisory
    Changed Reference Type https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0 No Types Assigned https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0 Release Notes, Third Party Advisory
    Changed Reference Type https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg No Types Assigned https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg Third Party Advisory
    Changed Reference Type https://github.com/matrix-org/matrix-spec-proposals/pull/3061 No Types Assigned https://github.com/matrix-org/matrix-spec-proposals/pull/3061 Patch, Third Party Advisory
    Changed Reference Type https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients No Types Assigned https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients Vendor Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration OR *cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:* versions up to (excluding) 19.7.0
  • CVE Modified by [email protected]

    Sep. 28, 2022

    Action Type Old Value New Value
    Removed CVSS V3.1 GitHub, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
    Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.13 }} -0.00%

score

0.46719

percentile

CVSS31 - Vulnerability Scoring System
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