CVE-2021-22898

Description

curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

CVSS breakdown

Affected products

• Debian / debian_linux9.0 – 9.0
• fedoraproject / fedora33 – 33
• fedoraproject / fedora34 – 34
• haxx / curl7.7 – 7.76.1
• oracle / communications_cloud_native_core_binding_support_function1.11.0 – 1.11.0
• oracle / communications_cloud_native_core_network_function_cloud_native_environment1.10.0 – 1.10.0
• oracle / communications_cloud_native_core_network_repository_function1.15.1 – 1.15.1
• oracle / communications_cloud_native_core_network_repository_function1.15.0 – 1.15.0
• oracle / communications_cloud_native_core_network_slice_selection_function1.8.0 – 1.8.0
• oracle / communications_cloud_native_core_service_communication_proxy1.15.0 – 1.15.0
• oracle / essbase11.1.2.4.047
• oracle / mysql_server5.7.34
• Siemens / sinec_infrastructure_network_services1.0.1.1
• Splunk / Universal Forwarder8.2.0 – 8.2.12
• Splunk / Universal Forwarder9.1.0 – 9.1.0

References

• MISChttps://hackerone.com/reports/1176461
• MISChttps://curl.se/docs/CVE-2021-22898.html
• PATCHhttps://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
• MAILING_LISThttps://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E
• VENDOR_ADVISORYhttps://www.oracle.com//security-alerts/cpujul2021.html
• MAILING_LISThttp://www.openwall.com/lists/oss-security/2021/07/21/4
• MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/
• MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2021/08/msg00017.html
• VENDOR_ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html
• VENDOR_ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2022.html
• MISChttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• VENDOR_ADVISORYhttps://www.debian.org/security/2022/dsa-5197
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.html