CVE-2021-22898: Infoleak
First published: Wed May 26 2021(Updated: )
cURL libcurl could allow a remote attacker to obtain sensitive information, caused by a flaw in the option parser for sending NEW_ENV variables. By sending a specially-crafted request using a clear-text network protocol, an attacker could exploit this vulnerability to obtain sensitive internal information to the server, and use this information to launch further attacks against the affected system.
Credit: support@hackerone.com support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/curl | <0:7.61.1-22.el8 | 0:7.61.1-22.el8 |
| debian/curl | <=7.64.0-4+deb10u2 | 7.64.0-4+deb10u7 7.74.0-1.3+deb11u9 7.74.0-1.3+deb11u10 7.88.1-10+deb12u3 7.88.1-10+deb12u4 8.4.0-2 |
| debian/curl | <=7.74.0-1.2<=7.64.0-4<=7.64.0-4+deb10u2<=7.64.0-4+deb10u1 | |
| Haxx Curl | >=7.7<=7.76.1 | |
| Debian Debian Linux | =9.0 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Oracle Communications Cloud Native Core Binding Support Function | =1.11.0 | |
| Oracle Communications Cloud Native Core Network Function Cloud Native Environment | =1.10.0 | |
| Oracle Communications Cloud Native Core Network Repository Function | =1.15.0 | |
| Oracle Communications Cloud Native Core Network Repository Function | =1.15.1 | |
| Oracle Communications Cloud Native Core Network Slice Selection Function | =1.8.0 | |
| Oracle Communications Cloud Native Core Service Communication Proxy | =1.15.0 | |
| Oracle Essbase | <11.1.2.4.047 | |
| Oracle Essbase | >=21.0<21.3 | |
| Oracle Mysql Server | <5.7.34 | |
| Oracle Mysql Server | >=8.0.15<8.0.25 | |
| Siemens Sinec Infrastructure Network Services | <1.0.1.1 | |
| IBM QRadar SIEM | <=7.5.0 GA | |
| IBM QRadar SIEM | <=7.4.3 GA - 7.4.3 FP4 | |
| IBM QRadar SIEM | <=7.3.3 GA - 7.3.3 FP10 | |
| redhat/curl | <7.77.0 | 7.77.0 |
| Splunk Universal Forwarder | >=8.2.0<8.2.12 | |
| Splunk Universal Forwarder | >=9.0.0<9.0.6 | |
| Splunk Universal Forwarder | =9.1.0 |
Remedy
This issue can be avoided by not setting any telnet options for the curl command line tool (using the -t / --telnet-option command line option) or the libcurl library (using the CURLOPT_TELNETOPTIONS option) when telnet protocol is not meant to be used. If telnet protocol needs to be used with curl / libcurl, along with the NEW_ENV telnet option, ensure that no environment variable set via the NEW_ENV option has the name or value longer than 127 bytes.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-22898 https://nvd.nist.gov/vuln/detail/CVE-2021-22898 https://curl.se/docs/CVE-2021-22898.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1964887
- https://access.redhat.com/errata/RHSA-2021:4511
- https://access.redhat.com/security/cve/cve-2021-22898
- https://curl.se/docs/CVE-2021-22898.html
- https://github.com/curl/curl/commit/a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4
- https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
- https://github.com/curl/curl/commit/894f6ec730597eb243618d33cc84d71add8d6a8a
- https://security-tracker.debian.org/tracker/CVE-2021-22898
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22898
- https://security-tracker.debian.org/tracker/CVE-2021-22924
- https://github.com/curl/curl/issues/7216
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989228
- http://www.openwall.com/lists/oss-security/2021/07/21/4
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://hackerone.com/reports/1176461
- https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c@%3Cissues.guacamole.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html
- https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/
- https://www.debian.org/security/2022/dsa-5197
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/202562
- https://www.ibm.com/support/pages/node/6574787 (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1964923
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1964924
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1964887#c9
- https://curl.se/changes.html#7_7
- https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E
- 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/
Frequently Asked Questions
What is CVE-2021-22898?
CVE-2021-22898 is a vulnerability in the curl library that allows for information disclosure when using the `-t` command line option.
What is the severity of CVE-2021-22898?
CVE-2021-22898 has a severity rating of 7.5 (high).
Which software versions are affected by CVE-2021-22898?
CVE-2021-22898 affects curl versions 7.7 through 7.76.1.
How can I fix CVE-2021-22898?
To fix CVE-2021-22898, update curl to version 7.88.1-11 or higher.
Is there any additional information available for CVE-2021-22898?
Yes, you can find additional information about CVE-2021-22898 in the references provided.
- collector/redhat-cve
- collector/security-tracker-debian
- collector/debian-bugs
- alias/CVE-2021-22898
- collector/nvd-index
- collector/ibm-support
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- agent/last-modified-date
- collector/redhat-bugzilla
- source/Red Hat
- agent/software-canonical-lookup
- agent/author
- agent/remedy
- agent/references
- agent/severity
- agent/weakness
- agent/tags
- agent/description
- agent/event
- collector/nvd-api
- source/NVD
- package-manager/redhat
- package-manager/debian
- vendor/haxx
- canonical/haxx curl
- version/haxx curl/7.7
- version/haxx curl/7.76.1
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- vendor/oracle
- canonical/oracle communications cloud native core binding support function
- version/oracle communications cloud native core binding support function/1.11.0
- canonical/oracle communications cloud native core network function cloud native environment
- version/oracle communications cloud native core network function cloud native environment/1.10.0
- canonical/oracle communications cloud native core network repository function
- version/oracle communications cloud native core network repository function/1.15.0
- version/oracle communications cloud native core network repository function/1.15.1
- canonical/oracle communications cloud native core network slice selection function
- version/oracle communications cloud native core network slice selection function/1.8.0
- canonical/oracle communications cloud native core service communication proxy
- version/oracle communications cloud native core service communication proxy/1.15.0
- canonical/oracle essbase
- version/oracle essbase/21.0
- canonical/oracle mysql server
- version/oracle mysql server/8.0.15
- vendor/siemens
- canonical/siemens sinec infrastructure network services
- vendor/ibm
- canonical/ibm qradar siem
- version/ibm qradar siem/7.5.0 ga
- version/ibm qradar siem/7.4.3 ga - 7.4.3 fp4
- version/ibm qradar siem/7.3.3 ga - 7.3.3 fp10
- vendor/splunk
- canonical/splunk universal forwarder
- version/splunk universal forwarder/8.2.0
- version/splunk universal forwarder/9.0.0
- version/splunk universal forwarder/9.1.0