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CVE-2018-1312

CRITICALCVSS 9.8/10EPSS 15.88%

Last modified

CVE-2018-1312 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.. EPSS estimates a 15.88% chance of exploitation in the next 30 days.

Description

In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
15.88%

96.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server2.4.1
ApacheHttp Server2.4.2
ApacheHttp Server2.4.3
ApacheHttp Server2.4.4
ApacheHttp Server2.4.6
ApacheHttp Server2.4.7
ApacheHttp Server2.4.9
ApacheHttp Server2.4.10
ApacheHttp Server2.4.12
ApacheHttp Server2.4.16
ApacheHttp Server2.4.17
ApacheHttp Server2.4.18
ApacheHttp Server2.4.20
ApacheHttp Server2.4.23
ApacheHttp Server2.4.25
ApacheHttp Server2.4.26
ApacheHttp Server2.4.27
ApacheHttp Server2.4.28
ApacheHttp Server2.4.29
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux17.10
CanonicalUbuntu Linux18.04
DebianDebian Linux7.0
DebianDebian Linux8.0
DebianDebian Linux9.0
NetappCloud BackupAll versions
NetappStoragegridAll versions
NetappClustered Data OntapAll versions
RedhatJboss Core Services1.0
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Eus7.6
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Server Aus7.6
RedhatEnterprise Linux Server Tus7.6
RedhatEnterprise Linux Workstation7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-1312?
In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.
How severe is CVE-2018-1312?
CVE-2018-1312 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 15.88% probability of exploitation in the next 30 days.
How do I fix CVE-2018-1312?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1312?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST