5.8

CVE-2015-3644: stunnel Improper Access Control

Modified
AliasesMGASA-2015-0289SUSE-SU-2015:1062-1UBUNTU-CVE-2015-3644
Published 14-05-2015Last modified 06-08-2024

Vulnerability summary

CVE-2015-3644 is a medium (CVSS 5.8) Improper Access Control vulnerability in stunnel. EPSS estimates a 2.12% chance of exploitation in the next 30 days, higher than 81.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.8/10
010
Medium · v2.0 (NVD)
EPSS score
2.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 14-05-2015
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.12%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.12% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Suse2 products
  • stunnel&distro=SUSE Linux Enterprise Server 12< 5.00-3.1
  • stunnel&distro=SUSE Linux Enterprise Server for SAP Applications 12< 5.00-3.1
Debian1 product
  • stunnel4< 3:5.18-1 | < 3:5.06-2+deb8u1
Mageia1 product
  • stunnel< 5.03-4.1.mga5
Opensuse1 product
  • stunnel&distro=openSUSE Tumbleweed< 5.65-1.1
Stunnel1 product
  • stunnel5.00 | 5.01 | 5.02 | 5.03 | 5.04 | 5.05 | 5.06 | 5.07 | 5.08 | 5.09 | 5.10 | 5.11 | 5.12 | 5.13
Ubuntu1 product
  • stunnel4< 3:5.18-1

6 vendors · 7 products

References

13 links
Show all 13 references