| Vulnerability Name: | CVE-2022-39251 (CCN-237470) | ||||||||||||||||||
| Published: | 2022-09-28 | ||||||||||||||||||
| Updated: | 2022-12-03 | ||||||||||||||||||
| Summary: | 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 that legitimately appear to have come from another person, without any indication such as a grey shield. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. Starting with version 19.7.0, matrix-js-sdk has been modified to only accept Olm-encrypted to-device messages. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround. | ||||||||||||||||||
| CVSS v3 Severity: | 8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N) 7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
6.5 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)
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| Vulnerability Type: | CWE-322) | ||||||||||||||||||
| Vulnerability Consequences: | Bypass Security | ||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2022-39251 Source: XF Type: UNKNOWN matrixjssdk-cve202239251-sec-bypass(237470) Source: security-advisories@github.com Type: Patch, Third Party Advisory security-advisories@github.com Source: security-advisories@github.com Type: Release Notes, Third Party Advisory security-advisories@github.com Source: CCN Type: Matrix Javascript SDK GIT Repository Olm/Megolm protocol confusion Source: security-advisories@github.com Type: Third Party Advisory security-advisories@github.com Source: security-advisories@github.com Type: Vendor Advisory security-advisories@github.com Source: security-advisories@github.com Type: Third Party Advisory security-advisories@github.com Source: CCN Type: SNYK-JS-MATRIXJSSDK-3035652 Authentication Bypass | ||||||||||||||||||
| Vulnerable Configuration: | Configuration RedHat 1: Denotes that component is vulnerable | ||||||||||||||||||
| Oval Definitions | |||||||||||||||||||
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