How severe is CVE-2024-23771?

CVE-2024-23771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-23771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23771?

CVE-2024-23771 affects Unix4lyfe Darkhttpd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-23771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-23771 have an EU (EUVD) identifier?

Yes. CVE-2024-23771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21224.

When was CVE-2024-23771 published?

CVE-2024-23771 was published on 2024-01-22 and last updated on 2026-06-17.

CVE-2024-23771

CVE-2024-23771 is a critical-severity vulnerability in Unix4lyfe Darkhttpd with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21224
Weakness: CWE-203
Affected product: Unix4lyfe Darkhttpd
Published: 2024-01-22
Last modified: 2026-06-17

Description

darkhttpd before 1.15 uses strcmp (which is not constant time) to verify authentication, which makes it easier for remote attackers to bypass authentication via a timing side channel.

Frequently asked questions

What is CVE-2024-23771?: darkhttpd before 1.15 uses strcmp (which is not constant time) to verify authentication, which makes it easier for remote attackers to bypass authentication via a timing side channel.
How severe is CVE-2024-23771?: CVE-2024-23771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-23771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23771?: CVE-2024-23771 affects Unix4lyfe Darkhttpd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-23771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-23771 have an EU (EUVD) identifier?: Yes. CVE-2024-23771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21224.
When was CVE-2024-23771 published?: CVE-2024-23771 was published on 2024-01-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:unix4lyfe:darkhttpd:*:*:*:*:*:*:*:*

More vulnerabilities in Unix4lyfe Darkhttpd

CVE-2020-25691 — High (CVSS 7.5): A flaw was found in darkhttpd. Invalid error handling allows remote attackers to cause denial-of-service by accessing a…
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CVE-2024-25714 — Critical (CVSS 9.8): In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel…
CVE-2024-25191 — Critical (CVSS 9.8): php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass…
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Browse all CWE-203 (Observable Discrepancy) vulnerabilities →