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CVE-2024-23771

26
FAUCET Score

CVE-2024-23771 is a critical authentication bypass vulnerability affecting darkhttpd versions prior to 1.15. It arises from the use of a non-constant time strcmp function for authentication, enabling remote attackers to bypass security via a timing side-channel attack. This vulnerability carries a CVSS score of 9.8, indicating a high potential for complete compromise of confidentiality, integrity, and availability with low attack complexity and no user interaction required. While no active exploitation, public exploit code, or significant community discussion has been observed, the inherent flaw presents a severe risk to affected systems.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.15CPE matchmatch criteria
cpe:2.3:a:unix4lyfe:darkhttpd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 46th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / emikulic/darkhttpd/commit/f477619d49f3c4de9ad59bd194265a48ddc03f04
Patch
github.com / emikulic/darkhttpd/compare/v1.14...v1.15
Product
openwall.com / lists/oss-security/2024/01/25/1
Mailing ListThird Party Advisory