Medium severity5.5NVD Advisory· Published Mar 30, 2023· Updated Jun 17, 2026
CVE-2023-27538
CVE-2023-27538
Description
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.
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Affected products
29- osv-coords25 versionspkg:rpm/almalinux/curlpkg:rpm/almalinux/curl-minimalpkg:rpm/almalinux/libcurlpkg:rpm/almalinux/libcurl-develpkg:rpm/almalinux/libcurl-minimalpkg:rpm/opensuse/curl&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/curl&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/opensuse/curl&distro=openSUSE%20Tumbleweedpkg:rpm/suse/curl&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP3pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-ESPOSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 7.76.1-26.el9+ 24 more
- (no CPE)range: < 7.76.1-26.el9
- (no CPE)range: < 7.76.1-26.el9
- (no CPE)range: < 7.76.1-26.el9
- (no CPE)range: < 7.76.1-26.el9
- (no CPE)range: < 7.76.1-26.el9
- (no CPE)range: < 7.79.1-150400.5.18.1
- (no CPE)range: < 7.79.1-150400.5.18.1
- (no CPE)range: < 8.0.1-1.1
- (no CPE)range: < 7.60.0-150000.51.1
- (no CPE)range: < 7.60.0-150000.51.1
- (no CPE)range: < 7.66.0-150200.4.52.1
- (no CPE)range: < 7.66.0-150200.4.52.1
- (no CPE)range: < 7.79.1-150400.5.18.1
- (no CPE)range: < 7.79.1-150400.5.18.1
- (no CPE)range: < 7.66.0-150200.4.52.1
- (no CPE)range: < 7.60.0-4.56.1
- (no CPE)range: < 7.60.0-4.56.1
- (no CPE)range: < 7.60.0-11.60.1
- (no CPE)range: < 7.60.0-150000.51.1
- (no CPE)range: < 7.60.0-4.56.1
- (no CPE)range: < 7.60.0-11.60.1
- (no CPE)range: < 7.60.0-150000.51.1
- (no CPE)range: < 7.60.0-11.60.1
- (no CPE)range: < 7.60.0-4.56.1
- (no CPE)range: < 7.60.0-4.56.1
Patches
Vulnerability mechanics
References
4- hackerone.com/reports/1898475nvdExploitThird Party Advisory
- security.gentoo.org/glsa/202310-12nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20230420-0010/nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlnvdMailing List
News mentions
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