CVE catalog
CVE-2023-27535
curl: CVE-2023-27535
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.80% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | curl | sid | 8.23.0-1 | fixed |
| Debian | curl | forky | 8.22.0-1 | fixed |
| Debian | curl | trixie | 8.14.1-2+deb13u5 | fixed |
| Debian | curl | trixie-security | 8.14.1-2+deb13u7 | fixed |
| Debian | curl | bookworm | 7.88.1-10+deb12u15 | fixed |
| Debian | curl | bookworm-security | 7.88.1-10+deb12u5 | fixed |
| Cpe | libcurl | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | debian_linux | Not reported | Not reported | unknown |
| Cpe | active_iq_unified_manager | Not reported | Not reported | unknown |
| Cpe | ontap_9 | Not reported | Not reported | unknown |
| Cpe | h300s_firmware | Not reported | Not reported | unknown |
| Cpe | h500s_firmware | Not reported | Not reported | unknown |
| Cpe | h700s_firmware | Not reported | Not reported | unknown |
| Cpe | h410s_firmware | Not reported | Not reported | unknown |
| Cpe | universal_forwarder | Not reported | Not reported | unknown |
| Alpine | curl | 3.14 | 8.0.1-r0 | fixed |
| Alpine | curl | 3.15 | 8.0.1-r0 | fixed |
| Alpine | curl | 3.16 | 8.0.1-r0 | fixed |
| Alpine | curl | 3.17 | 7.88.1-r1 | fixed |
| Alpine | curl | 3.18 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.19 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.20 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.21 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.22 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.23 | 8.0.0-r0 | fixed |
| Alpine | curl | 3.24 | 8.0.0-r0 | fixed |
| Ubuntu | curl | pro | 7.43.0-1ubuntu2 | vulnerable |
| Ubuntu | curl | pro | 7.45.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | pro | 7.46.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.1 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.2 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.3 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.4 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.5 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.6 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.7 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.8 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.9 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.11 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.12 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.13 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.14 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.15 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.16 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.18 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm1 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm2 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm3 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm4 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm5 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm6 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm7 | vulnerable |
| Ubuntu | curl | pro | 7.47.0-1ubuntu2.19+esm8 | fixed |
| Ubuntu | curl | 18.04 | 7.55.1-1ubuntu2 | vulnerable |
| Ubuntu | curl | 18.04 | 7.55.1-1ubuntu2.1 | vulnerable |
| Ubuntu | curl | 18.04 | 7.57.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu1 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu2 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.1 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.2 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.3 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.5 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.6 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.7 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.8 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.9 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.10 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.12 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.13 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.14 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.15 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.16 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.17 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.18 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.19 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.20 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.21 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.22 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.23 | vulnerable |
| Ubuntu | curl | 18.04 | 7.58.0-2ubuntu3.24 | fixed |
| Ubuntu | curl | 20.04 | 7.65.3-1ubuntu3 | vulnerable |
| Ubuntu | curl | 20.04 | 7.65.3-1ubuntu4 | vulnerable |
| Ubuntu | curl | 20.04 | 7.66.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | 20.04 | 7.67.0-2ubuntu1 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.1 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.2 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.4 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.5 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.6 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.7 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.10 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.11 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.12 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.13 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.14 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.15 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.16 | vulnerable |
| Ubuntu | curl | 20.04 | 7.68.0-1ubuntu2.18 | fixed |
| Ubuntu | curl | 22.04 | 7.74.0-1.3ubuntu2 | vulnerable |
| Ubuntu | curl | 22.04 | 7.74.0-1.3ubuntu3 | vulnerable |
| Ubuntu | curl | 22.04 | 7.80.0-3 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.1 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.2 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.3 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.4 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.6 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.7 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.8 | vulnerable |
| Ubuntu | curl | 22.04 | 7.81.0-1ubuntu1.10 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | curl | source | sid | 7.88.1-7 | not yet assigned | Not reported | Not reported |
| Debian | curl | source | forky | 7.88.1-7 | not yet assigned | Not reported | Not reported |
| Debian | curl | source | trixie | 7.88.1-7 | not yet assigned | Not reported | Not reported |
| Debian | curl | source | bookworm | 7.88.1-7 | not yet assigned | Not reported | Not reported |
| Alpine | curl | apk | 3.14 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.15 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.16 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.17 | 7.88.1-r1 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.18 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.19 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.20 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.21 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.22 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.23 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Alpine | curl | apk | 3.24 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27535 | Not reported |
| Ubuntu | curl | deb | pro | 7.47.0-1ubuntu2.19+esm8 | Not reported | UBUNTU-CVE-2023-27535 | Not reported |
| Ubuntu | curl | deb | 18.04 | 7.58.0-2ubuntu3.24 | Not reported | UBUNTU-CVE-2023-27535 | Not reported |
| Ubuntu | curl | deb | 20.04 | 7.68.0-1ubuntu2.18 | Not reported | UBUNTU-CVE-2023-27535 | Not reported |
| Ubuntu | curl | deb | 22.04 | 7.81.0-1ubuntu1.10 | Not reported | UBUNTU-CVE-2023-27535 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-806742.json]
- [https://cert-portal.siemens.com/productcert/html/ssa-398330.html]
- [https://cert-portal.siemens.com/productcert/html/ssa-806742.html]
- [https://cert-portal.siemens.com/productcert/html/ssa-943925.html]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2023_3106.json]
- [https://hackerone.com/reports/1892780]
- [https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html]
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/]
- [https://nvd.nist.gov/vuln/detail/CVE-2023-27535]
- [https://osv.dev/vulnerability/ALPINE-CVE-2023-27535]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-27535]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-27535]
- [https://security-tracker.debian.org/tracker/CVE-2023-27535]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-27535.json]
- [https://security.gentoo.org/glsa/202310-12]
- [https://security.netapp.com/advisory/ntap-20230420-0010/]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-1350.json]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]