CVE-2016-3739 · threatengine.sh

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CVE

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

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.

MEDIUM · CVSS 5.3 EPSS 0.01068

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules7 YARA rules0

⬡

Weakness Classification

CWE-20Improper Input Validation

▤

Affected Products & Versions

1

haxx curlall versions

◈

Sigma Hunt Rules

7

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

producthighSuspicious Download and Execute Pattern via Curl/Wget

producthighSuspicious File Download From File Sharing Domain Via Curl.EXE

producthighSuspicious File Download From IP Via Curl.EXE

producthighCurl Download And Execute Combination

producthighSuspicious Curl.EXE Download

productmediumSuspicious Curl File Upload - Linux

Show all 7 top matches

productmediumSuspicious Curl Change User Agents - Linux

See all related Sigma rules for this CVE

▣

Scoring & Timeline

5.3

MEDIUM · CVSS v3.0 · secalert@redhat.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD20 May 2016 · 02:59 PM

CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

🔗

References & Sources

11

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

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/CVE-2016-3739.patchVendor Advisory

Show all 11 references

https://curl.haxx.se/changes.html#7_49_0

https://curl.haxx.se/docs/adv_20160518.htmlVendor Advisory

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722

https://security.gentoo.org/glsa/201701-47

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