Medium severity5.9NVD Advisory· Published Mar 30, 2023· Updated Jun 17, 2026
CVE-2023-27535
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
28- 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
< 7.76.1-23.el9_2.1+ 24 more
- (no CPE)range: < 7.76.1-23.el9_2.1
- (no CPE)range: < 7.76.1-23.el9_2.1
- (no CPE)range: < 7.76.1-23.el9_2.1
- (no CPE)range: < 7.76.1-23.el9_2.1
- (no CPE)range: < 7.76.1-23.el9_2.1
- (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
5- hackerone.com/reports/1892780nvdExploitThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlnvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/nvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202310-12nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20230420-0010/nvdThird Party Advisory
News mentions
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