CVE catalog
CVE-2023-27538
curl: CVE-2023-27538
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.45% · Oct 25, 2026
An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.
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 | 8.0.0 | fixed |
| 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 | clustered_data_ontap | Not reported | Not reported | unknown |
| Cpe | brocade_fabric_operating_system_firmware | 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 | 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 |
| Cpe | libcurl | cpe | Not reported | 8.0.0 | Not reported | NVD-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.14 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.15 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.16 | 8.0.1-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.17 | 7.88.1-r1 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.18 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.19 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.20 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.21 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.22 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.23 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Alpine | curl | apk | 3.24 | 8.0.0-r0 | Not reported | ALPINE-CVE-2023-27538 | Not reported |
| Ubuntu | curl | deb | 18.04 | 7.58.0-2ubuntu3.24 | Not reported | UBUNTU-CVE-2023-27538 | Not reported |
| Ubuntu | curl | deb | 20.04 | 7.68.0-1ubuntu2.18 | Not reported | UBUNTU-CVE-2023-27538 | Not reported |
| Ubuntu | curl | deb | 22.04 | 7.81.0-1ubuntu1.10 | Not reported | UBUNTU-CVE-2023-27538 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-077170.json]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2023_0865-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2023-27538]
- [https://osv.dev/vulnerability/ALPINE-CVE-2023-27538]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-27538]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-27538]
- [https://security-tracker.debian.org/tracker/CVE-2023-27538]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-27538.json]
- [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]