Bug 1560599 (CVE-2017-15710)

Summary:	CVE-2017-15710 httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	apmukher, bnater, b.prins, chhudson, csutherl, deesharm, dffrench, dmasirka, drusso, gzaronik, hhorak, jclere, jdoyle, jkaluza, jmadigan, jorton, jshepherd, lgao, lgriffin, luhliari, mbabacek, mturk, myarboro, ngough, pahan, pslavice, pwright, rrajasek, rsvoboda, rupatel, trepel, twalsh, weli, yozone, ysoni
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	httpd 2.4.30	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-23 10:31:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1560601, 1560616, 1565464, 1565465, 1565466
Bug Blocks:	1560402

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