CVE-2021-22898
- State
- Published
- Severity
- 3.1 Low
- Published
- Jun 11, 2021
- Updated
- Oct 14, 2026
- Reserved
- Jan 6, 2021
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.1 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N | CISA-ADP |
Weaknesses
- CWE-200 Information Disclosure (CWE-200)
Affected Products
| Product | Versions |
|---|---|
https://github.com/curl/curln/a |
|
References
- https://hackerone.com/reports/1176461
- https://curl.se/docs/CVE-2021-22898.html
- https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
- [guacamole-issues] 20210618 [jira] [Created] (GUACAMOLE-1368) Latest docker image fails security scans.mailing-list
- https://www.oracle.com//security-alerts/cpujul2021.html
- [oss-security] 20210721 [SECURITY ADVISORY] curl: TELNET stack contents disclosure againmailing-list
- FEDORA-2021-83fdddca0fvendor-advisory
- FEDORA-2021-5d21b90a30vendor-advisory
- [debian-lts-announce] 20210813 [SECURITY] [DLA 2734-1] curl security updatemailing-list
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- DSA-5197vendor-advisory
- [debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security updatemailing-list
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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