VULNERABILITY INTELLIGENCE
CVE-2021-22898
CVSS score3.1 LOW
EPSS probability4.51%
CISA KEVNot currently listed
Published2021-06-11
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
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.
Weakness classification
- support@hackerone.com: CWE-200
- nvd@nist.gov: CWE-909
Primary references
- support@hackerone.com — Mailing List, Patch, Third Party Advisory
- support@hackerone.com — Patch, Third Party Advisory
- support@hackerone.com — Exploit, Patch, Vendor Advisory
- support@hackerone.com — Patch, Third Party Advisory
- support@hackerone.com — Exploit, Issue Tracking, Patch, Third Party Advisory
- support@hackerone.com — Mailing List, Third Party Advisory
- support@hackerone.com — Mailing List, Third Party Advisory
- support@hackerone.com — Third Party Advisory
- support@hackerone.com — Mailing List, Third Party Advisory
- support@hackerone.com — Mailing List, Third Party Advisory
- support@hackerone.com — Third Party Advisory
- support@hackerone.com — Patch, Third Party Advisory