| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-2734-1, DLA-3085-1, DSA-5197-1 |
| Debian Bugs | 989228 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| curl (PTS) | buster | 7.64.0-4+deb10u2 | vulnerable |
| buster (security) | 7.64.0-4+deb10u5 | fixed | |
| bullseye | 7.74.0-1.3+deb11u3 | fixed | |
| bullseye (security) | 7.74.0-1.3+deb11u7 | fixed | |
| bookworm | 7.88.1-7 | fixed | |
| sid | 7.88.1-8 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| curl | source | stretch | 7.52.1-5+deb9u15 | DLA-2734-1 | ||
| curl | source | buster | 7.64.0-4+deb10u3 | DLA-3085-1 | ||
| curl | source | bullseye | 7.74.0-1.3+deb11u2 | DSA-5197-1 | ||
| curl | source | (unstable) | 7.79.1-1 | 989228 |
https://curl.se/docs/CVE-2021-22898.html
Introduced by: https://github.com/curl/curl/commit/a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 (7.7)
Fixed by: https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde (7.77.0)
Followup to not make curl vulnerable to CVE-2021-22925:
https://github.com/curl/curl/commit/894f6ec730597eb243618d33cc84d71add8d6a8a (curl-7_78_0)