CVE-2021-22890

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Summary

CVECVE-2021-22890
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-01 18:15:12 UTC
Updated2026-10-14 11:16:52 UTC
Descriptioncurl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-300 | CWE-290 | CWE-300 Man-in-the-Middle (CWE-300)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1ADPDECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:M/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Broadcom Fabric Operating System - All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 34 All All All
Application Haxx Libcurl All All All All
Application Netapp Hci Management Node - All All All
Hardware Netapp Hci Storage Node - All All All
Application Netapp Solidfire - All All All
Application Oracle Communications Billing And Revenue Management 12.0.0.3.0 All All All
Application Oracle Essbase 21.2 All All All
Application Siemens Sinec Infrastructure Network Services All All All All
Application Splunk Universal Forwarder All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Https//github.com/curl/curl affected 7.63.0 to and including 7.75.0 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
April 2021 cURL/libcURL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
curl - TLS 1.3 session ticket proxy host mixup - CVE-2021-22890 af854a3a-2127-422b-91ae-364da2661108 curl.se Patch, Vendor Advisory
Oracle Critical Patch Update Advisory - July 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
HackerOne af854a3a-2127-422b-91ae-364da2661108 hackerone.com Exploit, Issue Tracking, Patch, Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-389290.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 32 Update: curl-7.69.1-8.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] Fedora 33 Update: curl-7.71.1-9.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
cURL: Multiple vulnerabilities (GLSA 202105-36) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Patch, Third Party Advisory
[SECURITY] Fedora 34 Update: curl-7.76.0-1.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] Fedora 34 Update: curl-7.76.0-1.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: curl-7.69.1-8.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 33 Update: curl-7.71.1-9.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 174942 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:1006-1)
  • 178522 Debian Security Update for curl (DSA 4881-1)
  • 179967 Debian Security Update for curl (CVE-2021-22890)
  • 198316 Ubuntu Security Notification for Curl Vulnerabilities (USN-4898-1)
  • 239451 Red Hat Update for Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP8 (RHSA-2021:2472)
  • 281384 Fedora Security Update for curl (FEDORA-2021-cab5c9befb)
  • 281385 Fedora Security Update for curl (FEDORA-2021-065371f385)
  • 281386 Fedora Security Update for curl (FEDORA-2021-26a293c72b)
  • 296059 Oracle Solaris 11.4 Support Repository Update (SRU) 36.0.1.101.2 Missing (CPUJUL2021)
  • 378599 Splunk Enterprise Third Party Package Updates for June (SVD-2023-0613)
  • 378883 Splunk Enterprise August Third Party Package Updates (SVD-2023-0808)
  • 500134 Alpine Linux Security Update for curl
  • 503785 Alpine Linux Security Update for curl
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670440 EulerOS Security Update for curl (EulerOS-SA-2021-2060)
  • 670451 EulerOS Security Update for curl (EulerOS-SA-2021-2049)
  • 670903 EulerOS Security Update for curl (EulerOS-SA-2021-2060)
  • 690177 Free Berkeley Software Distribution (FreeBSD) Security Update for curl (d10fc771-958f-11eb-9c34-080027f515ea)
  • 710078 Gentoo Linux cURL Multiple vulnerabilities (GLSA 202105-36)
  • 730155 McAfee Web Gateway Multiple Vulnerabilities(WP-3580, WP-3656, WP-3815, WP-3878, WP-3882, WP-3934,WP-3935, WP-3936, WP-3999)
  • 750283 OpenSUSE Security Update for curl (openSUSE-SU-2021:0510-1)
  • 900279 CBL-Mariner Linux Security Update for curl 7.74.0
  • 903340 Common Base Linux Mariner (CBL-Mariner) Security Update for curl (4048)

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