CVE-2021-22897

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Summary

CVECVE-2021-22897
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-06-11 16:15:10 UTC
Updated2026-05-28 21:16:27 UTC
Descriptioncurl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-840 | CWE-668 | CWE-840 Business Logic Errors (CWE-840)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

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

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

CVSS v2.0 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Haxx Curl All All All All
Application Oracle Communications Cloud Native Core Binding Support Function 1.11.0 All All All
Application Oracle Communications Cloud Native Core Network Function Cloud Native Environment 1.10.0 All All All
Application Oracle Communications Cloud Native Core Network Repository Function 1.15.0 All All All
Application Oracle Communications Cloud Native Core Network Repository Function 1.15.1 All All All
Application Oracle Communications Cloud Native Core Network Slice Selection Function 1.8.0 All All All
Application Oracle Communications Cloud Native Core Service Communication Proxy 1.15.0 All All All
Application Oracle Essbase All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Https//github.com/curl/curl affected 7.61.0 through 7.76.1 Not specified

References

ReferenceSourceLinkTags
HackerOne 134c704f-9b21-4f2e-91b3-4a467353bcc0 hackerone.com Exploit, Issue Tracking, Third Party Advisory
Oracle Critical Patch Update Advisory - April 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - July 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
schannel: don't use static to store selected ciphers · curl/curl@bbb7150 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
curl - schannel cipher selection surprise - CVE-2021-22897 af854a3a-2127-422b-91ae-364da2661108 curl.se Patch, Vendor Advisory
Oracle Critical Patch Update Advisory - January 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
June 2021 cURL/libcURL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com 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
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 296065 Oracle Solaris 11.4 Support Repository Update (SRU) 39.107.1 Missing (CPUOCT2021)
  • 378599 Splunk Enterprise Third Party Package Updates for June (SVD-2023-0613)
  • 378883 Splunk Enterprise August Third Party Package Updates (SVD-2023-0808)
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670481 EulerOS Security Update for curl (EulerOS-SA-2021-2239)
  • 670507 EulerOS Security Update for curl (EulerOS-SA-2021-2265)
  • 670532 EulerOS Security Update for curl (EulerOS-SA-2021-2290)
  • 900254 CBL-Mariner Linux Security Update for curl 7.76.0
  • 900905 Common Base Linux Mariner (CBL-Mariner) Security Update for curl (6358-1)
  • 903597 Common Base Linux Mariner (CBL-Mariner) Security Update for curl (4368)
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