Information disclosure in Haxx Curl
CVE-2021-22898
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.
Vulnerability class: Information Disclosure
EPSS: 0.044 (90.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
Affected products
- Haxx Curl
- Oracle Communications_cloud_native_core_binding_support_function — versions 1.11.0
- Oracle Communications_cloud_native_core_network_function_cloud_native_environment — versions 1.10.0
- Oracle Communications_cloud_native_core_network_repository_function — versions 1.15.0, 1.15.1
- Oracle Communications_cloud_native_core_network_slice_selection_function — versions 1.8.0
- Oracle Communications_cloud_native_core_service_communication_proxy — versions 1.15.0
- Oracle Essbase
- Oracle Mysql_server
- Siemens Sinec_infrastructure_network_services
- Splunk Universal_forwarder — versions 9.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- support@hackerone.com (Exploit, Patch, x_refsource_MISC, Vendor Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Third Party Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Third Party Advisory)
- support@hackerone.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-22898?
- CVE-2021-22898 is a low-severity vulnerability in Haxx Curl, classified under Information Disclosure. CVSS score: 3.1/10. Published 2021-06-11.
- How severe is CVE-2021-22898?
- Low severity. CVSS v3 base score is 3.1 out of 10.
- Is CVE-2021-22898 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.