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CVE-2022-23610— Improper Verification of Cryptographic Signature in wire-server

Quick assessment

Affected
wireapp wire-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wire是德国Wire公司的一款聊天软件。该软件支持 Web、WindowsiOS、Android、OS X 平台，有群组功能，可以语音通话，发送照片以及其独创性的打招呼方式 PING。 Wire Wire-server 存在数据伪造问题漏洞，该漏洞源于可以制作 DSA 签名以绕过 SAML SSO 并使用 SAML 凭据模拟任何 Wire 用户。在使用 SAML 但没有 SCIM 的团队中，可以使用伪造的 SAML 凭据创建新帐户。在攻击者可以建立的特定条件下，用于解析、呈现、签名和验证 SAML XM

CVSS 9.1 · Critical EPSS 0.70% · P52
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I. Basic Information for CVE-2022-23610

Vulnerability Information
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Vulnerability Title
Improper Verification of Cryptographic Signature in wire-server
Source: CVE Program / CVE List V5
Vulnerability Description
wire-server provides back end services for Wire, an open source messenger. In versions of wire-server prior to the 2022-01-27 release, it was possible to craft DSA Signatures to bypass SAML SSO and impersonate any Wire user with SAML credentials. In teams with SAML, but without SCIM, it was possible to create new accounts with fake SAML credentials. Under certain conditions that can be established by an attacker, an upstream library for parsing, rendering, signing, and validating SAML XML data was accepting public keys as trusted that were provided by the attacker in the signature. As a consequence, the attacker could login as any user in any Wire team with SAML SSO enabled. If SCIM was not enabled, the attacker could also create new users with new SAML NameIDs. In order to exploit this vulnerability, the attacker needs to know the SSO login code (distributed to all team members with SAML credentials and visible in the Team Management app), the SAML EntityID identifying the IdP (a URL not considered sensitive, but usually hard to guess, also visible in Team Management), and the SAML NameID of the user (usually an email address or a nick). The issue has been fixed in wire-server `2022-01-27` and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to `2022-01-27`, so that their backends are no longer affected. There are currently no known workarounds. More detailed information about how to reproduce the vulnerability and mitigation strategies is available in the GitHub Security Advisory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Wire 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wire是德国Wire公司的一款聊天软件。该软件支持 Web、WindowsiOS、Android、OS X 平台，有群组功能，可以语音通话，发送照片以及其独创性的打招呼方式 PING。 Wire Wire-server 存在数据伪造问题漏洞，该漏洞源于可以制作 DSA 签名以绕过 SAML SSO 并使用 SAML 凭据模拟任何 Wire 用户。在使用 SAML 但没有 SCIM 的团队中，可以使用伪造的 SAML 凭据创建新帐户。在攻击者可以建立的特定条件下，用于解析、呈现、签名和验证 SAML XM
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wireapp wire-server < 2022-01-27 -

II. Public POCs for CVE-2022-23610

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III. Intelligence Information for CVE-2022-23610

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Vendor Advisories for CVE-2022-23610 (1)

Other References for CVE-2022-23610 (1)

IV. Related Vulnerabilities

Same product: wire-server
Same vendor: wireapp
Same weakness: CWE-347

V. Comments for CVE-2022-23610

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