CVE-2021-22898 Information

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 Vector

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

Reference

https://hackerone.com/reports/1176461 https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde https://curl.se/docs/CVE-2021-22898.html https://curl.se/docs/CVE-2021-22898.html https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c@%3Cissues.guacamole.apache.org%3E https://www.oracle.com//security-alerts/cpujul2021.html http://www.openwall.com/lists/oss-security/2021/07/21/4 [oss-security] 20210721 [SECURITY ADVISORY] curl: TELNET stack contents disclosure again https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/ https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html [debian-lts-announce] 20210813 [SECURITY] [DLA 2734-1] curl security update https://www.oracle.com/security-alerts/cpujan2022.html https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://www.oracle.com/security-alerts/cpuapr2022.html 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. cpe:2.3:a:haxx:curl::::::::

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

3.1