8.1

CVE-2015-2318: debian debian_linux Improper Certificate Validation

CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2015-2318DEBIAN-CVE-2015-2318
Published 08-01-2018Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2015-2318 is a high (CVSS 8.1) Improper Certificate Validation vulnerability in debian debian_linux. EPSS estimates a 1.97% chance of exploitation in the next 30 days, higher than 80.1% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.0 (NVD)
EPSS score
1.97%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 1
DLA-176-1DSA-3202-1MGASA-2015-0156USN-2547-1

Timeline

  1. 08-01-2018
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation, aka a "SMACK SKIP-TLS" issue.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.97%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

0.00 pp

From 1.97% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.97%

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

Debian2 products
Mono-project1 product
Ubuntu1 product
  • mono< 3.2.8+dfsg-4ubuntu1.1

3 vendors · 4 products

References

13 links
Show all 13 references