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CVE-2017-7668

HIGHCVSS 7.5/10EPSS 57.47%

Last modified

CVE-2017-7668 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.. EPSS estimates a 57.47% chance of exploitation in the next 30 days.

Description

The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
57.47%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ApacheHttp Server2.2.32
ApacheHttp Server2.4.24
ApacheHttp Server2.4.25
NetappClustered Data OntapAll versions
NetappOncommand Unified ManagerAll versions
NetappStoragegridAll versions
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Eus7.2
RedhatEnterprise Linux Eus7.3
RedhatEnterprise Linux Eus7.4
RedhatEnterprise Linux Eus7.5
RedhatEnterprise Linux Eus7.6
RedhatEnterprise Linux Eus7.7
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Server Aus7.2
RedhatEnterprise Linux Server Aus7.3
RedhatEnterprise Linux Server Aus7.4
RedhatEnterprise Linux Server Aus7.6
RedhatEnterprise Linux Server Aus7.7
RedhatEnterprise Linux Server Tus7.2
RedhatEnterprise Linux Server Tus7.3
RedhatEnterprise Linux Server Tus7.4
RedhatEnterprise Linux Server Tus7.6
RedhatEnterprise Linux Server Tus7.7
RedhatEnterprise Linux Workstation7.0
DebianDebian Linux8.0
DebianDebian Linux9.0
OracleSecure Global Desktop5.3
AppleMac Os X< 10.13.1
AppleMac Os X>= 10.11.0, < 10.11.6
AppleMac Os X>= 10.12.0, < 10.12.6
AppleMac Os X10.11.6
AppleMac Os X10.12.6

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-7668?
The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.
How severe is CVE-2017-7668?
CVE-2017-7668 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 57.47% probability of exploitation in the next 30 days.
How do I fix CVE-2017-7668?
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.

How Strix Helps

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Source: NVD / NIST