CVE-2021-22925
curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl.
Does this matter?
Lower severity and a low EPSS score (5.37%). Track it; it rarely justifies an emergency change on its own.
Description
curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 5.37% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200, CWE-908
- Affected
- haxx/curl · fedoraproject/fedora · netapp/cloud backup · netapp/clustered data ontap · netapp/hci management node · netapp/solidfire · apple/mac os x · apple/macos · oracle/mysql server · oracle/peoplesoft enterprise peopletools · siemens/sinec infrastructure network services · siemens/sinema remote connect server · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h300e firmware · netapp/h500e firmware · netapp/h700e firmware · netapp/h410s firmware · splunk/universal forwarder
- Source
- support@hackerone.com
EPSS 5.4% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/40Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfThird Party Advisory
- https://hackerone.com/reports/1223882Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202212-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/Third Party Advisory
- https://support.apple.com/kb/HT212804Third Party Advisory
- https://support.apple.com/kb/HT212805Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/40Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfThird Party Advisory
- https://hackerone.com/reports/1223882Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202212-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/Third Party Advisory
- https://support.apple.com/kb/HT212804Third Party Advisory
- https://support.apple.com/kb/HT212805Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-484086.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.