| Name | CVE-2023-27535 |
| Description | An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3398-1 |
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+deb10u9 | fixed | |
| bullseye (security), bullseye | 7.74.0-1.3+deb11u11 | fixed | |
| bookworm, bookworm (security) | 7.88.1-10+deb12u5 | fixed | |
| trixie | 8.5.0-2 | fixed | |
| sid | 8.7.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| curl | source | buster | 7.64.0-4+deb10u6 | DLA-3398-1 | ||
| curl | source | bullseye | 7.74.0-1.3+deb11u8 | |||
| curl | source | (unstable) | 7.88.1-7 |
https://curl.se/docs/CVE-2023-27535.html
Introduced by: https://github.com/curl/curl/commit/177dbc7be07125582ddb7416dba7140b88ab9f62 (curl-7_13_0)
Fixed by: https://github.com/curl/curl/commit/8f4608468b890dce2dad9f91d5607ee7e9c1aba1 (curl-8_0_0)