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