CVE-2016-3739
MEDIUM severity · CVSS 5.3 · Improper input validation
5.3CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionRequired
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)6%
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://curl.haxx.se/CVE-2016-3739.patchAdvisory
- https://curl.haxx.se/docs/adv_20160518.htmlAdvisory
- http://www.openwall.com/lists/oss-security/2024/03/27/4
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/90726
- http://www.securitytracker.com/id/1035907
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349
- https://curl.haxx.se/changes.html#7_49_0