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HIGH

httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values

Published Mar 26, 2018

Description

In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.

Affected products

Remediation

No remediation recorded yet.

Metrics

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (31)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Mar 26, 2018
Updated Sep 17, 2024
Reserved Oct 21, 2017
Link CVE-2017-15710
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2017-15710
Red Hat
Severity Low
Public date Mar 24, 2018
Links CVE-2017-15710 - Bugzilla