Vulnerability Name:

CVE-2021-20234 (CCN-199734)

Assigned:2020-07-07
Published:2020-07-07
Updated:2022-08-05
Summary:An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/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): None
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-401
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-20234

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1921972

Source: XF
Type: UNKNOWN
zeromq-cve202120234-dos(199734)

Source: CCN
Type: ZeroMQ GIT Repository
Memory leak in client induced by malicious server(s) without CURVE/ZAP

Source: MISC
Type: Exploit, Patch, Third Party Advisory
https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87

Source: CCN
Type: ZeroMQ Web site
ZeroMQ

Vulnerable Configuration:Configuration 1:
  • cpe:/a:zeromq:libzmq:*:*:*:*:*:*:*:* (Version < 4.3.3)

    • Configuration CCN 1:
  • cpe:/a:zeromq:zeromq:4.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:zeromq:zeromq:4.0.4:*:*:*:*:*:*:*
  • OR cpe:/a:zeromq:zeromq:4.0.5:*:*:*:*:*:*:*
  • OR cpe:/a:zeromq:zeromq:4.1.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    zeromq libzmq *
    zeromq zeromq 4.0.0
    zeromq zeromq 4.0.4
    zeromq zeromq 4.0.5
    zeromq zeromq 4.1.0