Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, o

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• apache http serverup to 2.2.34 inclusive
• apache http server2.4.0
• apache http server2.4.1
• apache http server2.4.10
• apache http server2.4.12
• apache http server2.4.16
• apache http server2.4.17
• apache http server2.4.18
• apache http server2.4.2
• apache http server2.4.20
• apache http server2.4.23
• apache http server2.4.25
• apache http server2.4.26
• apache http server2.4.27
• apache http server2.4.3
• apache http server2.4.4
• apache http server2.4.6
• apache http server2.4.7
• apache http server2.4.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

• Apache Software Foundation Apache HTTP Server

  • Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2021-42013Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)KEV
  99Now
• CVE-2021-41773Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49KEV
  99Now
• CVE-2024-38475Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.KEV
  96Now
• CVE-2019-0211In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes orKEV
  81Now
• CVE-2021-44790Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier
  68This week
• CVE-2010-0425modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through 2.0.63, 2.2.0 through 2.2.14, and 2.3.x before 2.3.7, w
  68This week

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.