Low severity3.1NVD Advisory· Published Jun 11, 2021· Updated Apr 16, 2026

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Curl/Curl2 versions
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*range: >=7.7,<=7.76.1
- (no CPE)range: >=7.7, <=7.76.1
Oracle Corporation/Communications Cloud Native Core Binding Support Function
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Function Cloud Native Environment
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Repository Function2 versions
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Slice Selection Function
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Service Communication Proxy
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*
Oracle Corporation/Essbase
cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:*
Range: <11.1.2.4.047
Oracle Corporation/Mysql Server
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
Range: <5.7.34
Siemens Foundation/Sinec Infrastructure Network Services
cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*
Range: <1.0.1.1
Splunk/Universal Forwarder2 versions
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*range: >=8.2.0,<8.2.12
- cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
Debian/linux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Fedoraproject/Fedora2 versions
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Curl/Libcurlllm-fuzzy
Range: >=7.7, <=7.76.1
osv-coords35 versions
pkg:rpm/almalinux/curl pkg:rpm/almalinux/libcurl pkg:rpm/almalinux/libcurl-devel pkg:rpm/almalinux/libcurl-minimal pkg:rpm/opensuse/curl&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/curl&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/curl&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/curl-mini&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/curl-mini&distro=openSUSE%20Leap%2015.3 pkg:rpm/suse/curl&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Micro%205.0 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/curl&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/curl&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/curl&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/curl-openssl1&distro=SUSE%20Linux%20Enterprise%20Server%2011-SECURITY
< 7.61.1-22.el8+ 34 more
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.66.0-lp152.3.18.1
- (no CPE)range: < 7.66.0-4.17.1
- (no CPE)range: < 7.79.1-1.1
- (no CPE)range: < 7.66.0-lp152.3.18.1
- (no CPE)range: < 7.66.0-4.17.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.66.0-4.17.1
- (no CPE)range: < 7.66.0-4.17.1
- (no CPE)range: < 7.66.0-4.17.1
- (no CPE)range: < 7.37.0-70.66.1
- (no CPE)range: < 7.37.0-70.66.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-11.18.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-11.18.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-11.18.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.37.0-70.63.1

Patches

Vulnerability mechanics

References

www.openwall.com/lists/oss-security/2021/07/21/4nvdMailing ListPatchThird Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfnvdPatchThird Party Advisory
github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bdenvdPatchThird Party Advisory
www.oracle.com//security-alerts/cpujul2021.htmlnvdPatchThird Party Advisory
www.oracle.com/security-alerts/cpuapr2022.htmlnvdPatchThird Party Advisory
www.oracle.com/security-alerts/cpujan2022.htmlnvdPatchThird Party Advisory
curl.se/docs/CVE-2021-22898.htmlnvdExploitPatchVendor Advisory
hackerone.com/reports/1176461nvdExploitIssue TrackingPatchThird Party Advisory
lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3EnvdMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2021/08/msg00017.htmlnvdMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlnvdThird Party Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/nvdMailing ListThird Party Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/nvdMailing ListThird Party Advisory
www.debian.org/security/2022/dsa-5197nvdThird Party Advisory

News mentions

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cvss	0.202
epss	0.004
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000