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Fencer Intel
medium 5.0

CVE-2015-3143 json

cURL and libcurl 7.10.6 through 7.41.0 does not properly re-use NTLM connections, which allows remote attackers to connect as other users v…

published 11y ago modified 4mo ago also EUVD-2015-3224

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.1%
EPSS 11.1% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

cURL and libcurl 7.10.6 through 7.41.0 does not properly re-use NTLM connections, which allows remote attackers to connect as other users via an unauthenticated request, a similar issue to CVE-2014-0015.

Patch / fix

  • haxx curl 7.42.0
  • haxx libcurl 7.42.0
  • curl Debian 14, Debian 13, Debian 12 7.42.0-1

debian advisories DEBIAN-CVE-2015-3143

  • curl Ubuntu 14.04 LTS 7.35.0-1ubuntu2.5

ubuntu advisories UBUNTU-CVE-2015-3143

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl RHEL 7 7.29.0-25.el7
  • libcurl RHEL 7 7.29.0-25.el7
  • curl RHEL 6 7.19.7-46.el6
  • libcurl RHEL 6 7.19.7-46.el6

red hat advisories RHSA-2015:2159RHSA-2015:1254

  • curl SLES for SAP 12, SLES 12, SLED 12 +1 more 7.37.0-15.1

suse advisories SUSE-SU-2015:0990-1

  • curl openSUSE Tumbleweed 7.51.0-1.1

opensuse advisories openSUSE-SU-2024:10303-1

Is CVE-2015-3143 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3143 updated cvss 4.0

curl: re-using authenticated connection when unauthenticated

  • Red Hat Ceph Storage 1.2 curl Red Hat Enterprise Linux 5 curl
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Virtualization 3 mingw-virt-viewer, mingw32-virt-viewer, mingw64-virt-viewer
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux Client (v. 7) curl 7.29.0-25.el7, libcurl 7.29.0-25.el7 Red Hat Enterprise Linux Client Optional (v. 7) libcurl-devel 7.29.0-25.el7, curl-debuginfo 7.29.0-25.el7 Red Hat Enterprise Linux ComputeNode (v. 7) curl 7.29.0-25.el7, libcurl 7.29.0-25.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcurl-devel 7.29.0-25.el7, curl-debuginfo 7.29.0-25.el7
    fixed: vendor fix RHSA-2015:2159
  • Red Hat Enterprise Linux Desktop (v. 6) curl 7.19.7-46.el6, libcurl 7.19.7-46.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) libcurl-devel 7.19.7-46.el6, curl-debuginfo 7.19.7-46.el6 Red Hat Enterprise Linux HPC Node (v. 6) curl 7.19.7-46.el6, libcurl 7.19.7-46.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) libcurl-devel 7.19.7-46.el6, curl-debuginfo 7.19.7-46.el6 Red Hat Enterprise Linux Server (v. 6) curl 7.19.7-46.el6, libcurl 7.19.7-46.el6
    fixed: vendor fix RHSA-2015:1254
  • Red Hat Enterprise Linux Server (v. 7) curl 7.29.0-25.el7, libcurl 7.29.0-25.el7
    fixed: vendor fix RHSA-2015:2159
  • Red Hat Enterprise Linux Workstation (v. 6) curl 7.19.7-46.el6, libcurl 7.19.7-46.el6
    fixed: vendor fix RHSA-2015:1254
  • Red Hat Enterprise Linux Workstation (v. 7) curl 7.29.0-25.el7, libcurl 7.29.0-25.el7
    fixed: vendor fix RHSA-2015:2159

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

11.15% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Improve affected version range and add fix versions.