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CVE-2018-1000159

20
FAUCET Score

CVE-2018-1000159 affects tlslite-ng version 0.7.3 and earlier, stemming from an improper validation of integrity check value in its TLS implementation. This vulnerability allows a man-in-the-middle attacker to manipulate TLS ciphertext without detection by the receiving tlslite-ng instance. The vulnerability is rated Medium severity (CVSS 5.9), indicating a network-based attack with high impact on integrity but no impact on confidentiality or availability. The attack complexity is high, requiring specific conditions for successful exploitation. There is no evidence of active exploitation, nor are there publicly available exploit codes in Metasploit, Nuclei, or ExploitDB. The vulnerability has received minimal community discussion and media coverage, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.7.3CPE matchmatch criteria
cpe:2.3:a:tlslite-ng_project:tlslite-ng:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 11th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: tlslite-ngFixed in: 0.7.4

Vendor Advisories (1)

pipGHSA-cwh5-3cw7-4286high

tlslite-ng off-by-one error on mac checking

Jul 12, 2018

References

github.com / tomato42/tlslite-ng/pull/234
Third Party Advisory