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CVE-2024-38475

critical

Description

Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.

References

https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227

https://security.netapp.com/advisory/ntap-20240712-0001/

https://httpd.apache.org/security/vulnerabilities_24.html

http://www.openwall.com/lists/oss-security/2024/07/01/8

https://www.bleepingcomputer.com/news/security/sonicwall-urges-admins-to-patch-vpn-flaw-exploited-in-attacks/

https://thehackernews.com/2025/05/sonicwall-patches-3-flaws-in-sma-100.html

https://www.hipaajournal.com/sonicwall-sma-vulnerabilities-actively-exploited-in-attacks/

https://hackread.com/watchtowr-exploits-target-sonicwall-sma-100-devices/

https://www.helpnetsecurity.com/2025/05/02/sonicwall-cve-2024-38475-cve-2023-44221-exploited/

https://securityaffairs.com/177301/hacking/u-s-cisa-adds-sonicwall-sma100-and-apache-http-server-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.securityweek.com/sonicwall-flags-two-vulnerabilities-as-exploited/

https://www.cisa.gov/news-events/alerts/2025/05/01/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://thehackernews.com/2025/05/sonicwall-confirms-active-exploitation.html

https://www.bleepingcomputer.com/news/security/sonicwall-sma100-vpn-vulnerabilities-now-exploited-in-attacks/

https://www.securityweek.com/sonicwall-patches-6-vulnerabilities-in-secure-access-gateway/

https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf

Details

Source: Mitre, NVD

Published: 2024-07-01

Updated: 2025-05-02

Named Vulnerability: SonicBoomKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 9.1

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

Severity: Critical

EPSS

EPSS: 0.92376

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest