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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.069 (93.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.069 · newest: 0.069 · change: 0.000
Affected products
- Haxx Curl — versions 7.21.0, 7.21.1, 7.21.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay
- www.securitytracker.com/id/1035907 (vdb-entry)
- curl.haxx.se/docs/adv_20160518.html (Vendor Advisory)
- www.slackware.com/security/viewer.php (vendor-advisory)
- www.securityfocus.com/bid/90726 (vdb-entry)
- curl.haxx.se/CVE-2016-3739.patch (Vendor Advisory)
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay
- www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- security.gentoo.org/glsa/201701-47 (vendor-advisory)
- curl.haxx.se/changes.html
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.