Improper input validation in Haxx Curl
CVE-2016-3739
The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.064 (92.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Haxx Curl — versions 7.21.0, 7.21.1, 7.21.2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com
- secalert@redhat.com (vdb-entry)
- secalert@redhat.com (Vendor Advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vdb-entry)
- secalert@redhat.com (Vendor Advisory)
- secalert@redhat.com
- secalert@redhat.com
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2016-3739?
- CVE-2016-3739 is a medium-severity vulnerability in Haxx Curl, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2016-05-20.
- How severe is CVE-2016-3739?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2016-3739 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.