CVE-2021-22898
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.1epss 4.5%
exploitation probability
4.5%top 9% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Affected products
n/a · https://github.com/curl/curlReferences
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfhttps://curl.se/docs/CVE-2021-22898.htmlhttps://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bdehttps://hackerone.com/reports/1176461https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2021/08/msg00017.htmlhttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlhttps://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://www.debian.org/security/2022/dsa-5197https://www.oracle.com/security-alerts/cpuapr2022.htmlhttps://www.oracle.com/security-alerts/cpujan2022.html