Bug 1560599 (CVE-2017-15710) - CVE-2017-15710 httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values
Summary: CVE-2017-15710 httpd: Out of bounds write in mod_authnz_ldap when using too s...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-15710
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1560601 1560616 1565464 1565465 1565466
Blocks: 1560402
TreeView+ depends on / blocked
 
Reported: 2018-03-26 14:28 UTC by Adam Mariš
Modified: 2023-10-06 17:45 UTC (History)
35 users (show)

Fixed In Version: httpd 2.4.30
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2020-03-23 10:31:53 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3558 0 None None None 2018-11-13 08:36:00 UTC
Red Hat Product Errata RHSA-2019:0366 0 None None None 2019-02-18 16:55:44 UTC
Red Hat Product Errata RHSA-2019:0367 0 None None None 2019-02-18 16:58:24 UTC
Red Hat Product Errata RHSA-2020:1121 0 None None None 2020-03-31 19:24:40 UTC

Description Adam Mariš 2018-03-26 14:28:27 UTC 
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.

Versions Affected:
httpd 2.0.23 to 2.0.65
httpd 2.2.0 to 2.2.34
httpd 2.4.0 to 2.4.29

External References:

https://httpd.apache.org/security/vulnerabilities_24.html
Comment 2 Adam Mariš 2018-03-26 15:03:58 UTC 
Created httpd tracking bugs for this issue:

Affects: fedora-all [bug 1560616]
Comment 5 Huzaifa S. Sidhpurwala 2018-04-10 04:56:23 UTC 
Upstream commit:

http://svn.apache.org/viewvc?view=revision&revision=1824336
Comment 11 errata-xmlrpc 2018-11-13 08:35:45 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2018:3558 https://access.redhat.com/errata/RHSA-2018:3558
Comment 12 errata-xmlrpc 2019-02-18 16:55:42 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services

Via RHSA-2019:0366 https://access.redhat.com/errata/RHSA-2019:0366
Comment 13 errata-xmlrpc 2019-02-18 16:58:23 UTC 
This issue has been addressed in the following products:

  JBoss Core Services on RHEL 6
  JBoss Core Services on RHEL 7

Via RHSA-2019:0367 https://access.redhat.com/errata/RHSA-2019:0367
Comment 15 Product Security DevOps Team 2020-03-23 10:31:53 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-15710
Comment 20 errata-xmlrpc 2020-03-31 19:24:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1121 https://access.redhat.com/errata/RHSA-2020:1121
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