Vulnerability Name:

CVE-2021-32919 (CCN-201793)

Assigned:2021-05-13
Published:2021-05-13
Updated:2021-05-26
Summary:An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled).
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (CCN 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)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-295
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-32919

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20210513 Prosody XMPP server advisory 2021-05-12 (multiple vulnerabilities)

Source: MLIST
Type: Mailing List, Mitigation, Third Party Advisory
[oss-security] 20210514 Re: Prosody XMPP server advisory 2021-05-12 (multiple vulnerabilities)

Source: MISC
Type: Release Notes, Vendor Advisory
https://blog.prosody.im/prosody-0.11.9-released/

Source: XF
Type: UNKNOWN
prosody-cve202132919-sec-bypass(201793)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-b5d8c6d086

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-498be8f560

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-a33f6e36e1

Source: CCN
Type: Prosody security advisory 2021-05-12
Prosody security advisory 2021-05-12

Source: CCN
Type: oss-sec Mailing List, Wed, 5 May 2021 09:38:05 -0700
Prosody XMPP server advisory 2021-05-12 (multiple vulnerabilities)

Source: MISC
Type: Third Party Advisory
https://security.gentoo.org/glsa/202105-15

Source: DEBIAN
Type: Third Party Advisory
DSA-4916

Vulnerable Configuration:Configuration 1:
  • cpe:/a:prosody:prosody:*:*:*:*:*:*:*:* (Version >= 0.10.0 and < 0.11.9)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:113177
    P
    		prosody-0.11.10-1.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106599
    P
    		prosody-0.11.10-1.2 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:111539
    P
    		Security update for prosody (Moderate)
    2021-07-08
    oval:org.opensuse.security:def:11241
    P
    		Security update for prosody (Moderate)
    2021-07-08
    oval:org.opensuse.security:def:96482
    P
    		Security update for prosody (Important)
    2021-05-18
    oval:org.opensuse.security:def:109829
    P
    		Security update for prosody (Important)
    2021-05-18
    oval:org.opensuse.security:def:103172
    P
    		Security update for prosody (Important)
    2021-05-18
    oval:org.opensuse.security:def:11214
    P
    		Security update for prosody (Important)
    2021-05-18
    oval:org.opensuse.security:def:111383
    P
    		Security update for prosody (Important)
    2021-05-14
    BACK
    prosody prosody *
    debian debian linux 10.0
    fedoraproject fedora 32
    fedoraproject fedora 33
    fedoraproject fedora 34