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Out-of-bounds Write Affecting mod_proxy_html package, versions <1:2.4.6-93.el7

Severity

 Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
2.64% (91st percentile)

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  • Snyk IDSNYK-CENTOS7-MODPROXYHTML-2157449
  • published26 Jul 2021
  • disclosed24 Mar 2018
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Introduced: 24 Mar 2018

CVE-2017-15710  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Centos:7 mod_proxy_html to version 1:2.4.6-93.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_proxy_html package and not the mod_proxy_html package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

References