5.3

CVE-2016-3739: haxx curl Improper Input Validation

CVSS: 5.3v3.0MediumModified
AliasesDEBIAN-CVE-2016-3739
Published 20-05-2016Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-3739 is a medium (CVSS 5.3) Improper Input Validation vulnerability in haxx curl. EPSS estimates a 6.93% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.0 (NVD)
EPSS score
6.93%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-05-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

6.93%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 6.93% on 18-09-2026

18-09-202618-10-2026
EPSS score
6.93%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • curl< 7.50.1-1
Haxx1 product
  • curl7.21.0 | 7.21.1 | 7.21.2 | 7.21.3 | 7.21.4 | 7.21.5 | 7.21.6 | 7.21.7 | 7.22.0 | 7.23.0 | 7.23.1 | 7.24.0 | 7.25.0 | 7.26.0 | 7.27.0 | 7.28.0 | 7.28.1 | 7.29.0 | 7.30.0 | 7.31.0 | 7.32.0 | 7.33.0 | 7.34.0 | 7.35.0 | 7.36.0 | 7.38.0 | 7.39.0 | 7.40.0 | 7.41.0 | 7.42.0 | 7.42.1 | 7.43.0 | 7.44.0 | 7.45.0 | 7.46.0 | 7.47.0 | 7.48.0

2 vendors · 2 products

References

12 links
Show all 12 references