PT-2017-17755 · Curl+2 · Libcurl+3

Lijian996 · Published 2017-04-19 · Updated 2026-05-18 · CVE-2017-7468

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions curl and libcurl versions 7.52.0 through 7.53.1

Description The issue arises from libcurl attempting to resume a TLS session even when the client certificate has changed. This is problematic because a server may skip the client certificate check on resume and use the old identity established by the previous certificate. libcurl uses TLS session id/ticket by default to resume previous TLS sessions, which can lead to this flaw. This is a regression issue similar to one previously reported.

Recommendations For versions 7.52.0 through 7.53.1, update to a version outside of this range to resolve the issue. As a temporary workaround, consider disabling the use of TLS session id/ticket to prevent the resumption of TLS sessions with changed client certificates.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-305

CWE-295

Related Identifiers

ALT-PU-2017-1492

CLEANSTART-2026-AY18527

CLEANSTART-2026-BW46578

CLEANSTART-2026-DI23929

CLEANSTART-2026-LQ42192

CLEANSTART-2026-OF85770

CVE-2017-7468

OPENSUSE-SU-2024:10582-1

Affected Products

Alt Linux

Ubuntu

Curl

Libcurl

References · 317

• https://nvd.nist.gov/vuln/detail/CVE-2023-28321 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-27779 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-7264 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-0500 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2017-7468 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-27781 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-27534 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-22924 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-8169 · Security Note
• https://osv.dev/vulnerability/CVE-2017-7468 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-7468 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-22925 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2017-1000257 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2016-8619 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2014-0139 · Security Note