PT-2022-11366 · Wire · Wire-Server

Tom Sydney Kerckhove · Published 2022-04-13 · Updated 2022-04-21 · CVE-2021-41119

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions wire-server versions prior to 2022-03-01

Description The issue is a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it, which can lead to a denial of service for a heavily used server. The problem has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services.

Recommendations For wire-server versions prior to 2022-03-01, update to version 2022-03-01 to resolve the issue. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. As a temporary workaround, consider restricting the input of crafted objects to minimize the risk of exploitation.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2021-41119

GHSA-PHXV-PFFH-FQ2R

Affected Products

Wire-Server

References · 11

• 🔥 https://cs-syd.eu/posts/2021-09-11-json-vulnerability · Exploit
• https://ubuntu.com/security/CVE-2021-41119 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-41119 · Security Note
• https://osv.dev/vulnerability/CVE-2021-41119 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-41119 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-41119 · Security Note
• https://github.com/wireapp/wire-server/security/advisories/GHSA-phxv-pffh-fq2r · Note
• https://github.com/haskell/aeson/commit/582a844d8028f62e409048a4caae187b27e8e697 · Note
• https://github.com/haskell/aeson/issues/864 · Note
• https://t.me/cvenotify/28897 · Telegram Post
• https://hackage.haskell.org/package/aeson-2.0.1.0 · Note