PT-2020-17851 · Ssb-Db+2 · Ssb-Db+2

Arj03 + 4 · Published 2020-06-11 · Updated 2020-06-17 · CVE-2020-4045

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions SSB-DB version 20.0.0 SSB-Server version 16.0.0

Description The issue is an information disclosure vulnerability. The get() method is supposed to only decrypt messages when explicitly asked to, but there is a bug where it decrypts any message that it can. This means that it returns the decrypted content of private messages, which a malicious peer could use to get access to private data. This only affects peers running SSB-DB@20.0.0 who also have private messages, and is only known to be exploitable if you're also running SSB-OOO, which exposes a thin wrapper around get() to anonymous peers.

Recommendations For SSB-DB version 20.0.0, upgrade to version 20.0.1 immediately. For SSB-Server version 16.0.0, upgrade to version 16.0.1 to get the fixed version of SSB-DB. As a temporary workaround, consider disabling the SSB-OOO plugin to disable the most obvious attack vector.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2020-4045

GHSA-MPGR-2CX9-327H

Affected Products

Ssb-Db

Ssb-Ooo

Ssb-Server

References · 6

• https://github.com/ssbc/ssb-db/commit/43334d0871c9cc6220e0f6d6338499060f7761d4 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-4045 · Security Note
• https://osv.dev/vulnerability/CVE-2020-4045 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-mpgr-2cx9-327h · Vendor Advisory
• https://github.com/ssbc/ssb-db/security/advisories/GHSA-mpgr-2cx9-327h · Note
• https://t.me/cvenotify/4326 · Telegram Post