CVE-2023-27535
Publication date 20 March 2023
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| curl | ||
| 22.04 LTS jammy |
Fixed 7.81.0-1ubuntu1.10
|
|
| 20.04 LTS focal |
Fixed 7.68.0-1ubuntu2.18
|
|
| 18.04 LTS bionic |
Fixed 7.58.0-2ubuntu3.24
|
|
| 16.04 LTS xenial |
Fixed 7.47.0-1ubuntu2.19+esm8
|
|
| 14.04 LTS trusty |
Fixed 7.35.0-1ubuntu2.20+esm15
|
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Get Ubuntu ProSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.9 · Medium
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-5964-1
- curl vulnerabilities
- 20 March 2023
- USN-5964-2
- curl vulnerabilities
- 27 March 2023