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Vulnerability Details : CVE-2017-15710

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.
Publish Date : 2018-03-26 Last Update Date : 2018-05-01
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 787

- Products Affected By CVE-2017-15710

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Http Server 2.4.1 Version Details Vulnerabilities
2 Application Apache Http Server 2.4.2 Version Details Vulnerabilities
3 Application Apache Http Server 2.4.3 Version Details Vulnerabilities
4 Application Apache Http Server 2.4.4 Version Details Vulnerabilities
5 Application Apache Http Server 2.4.6 Version Details Vulnerabilities
6 Application Apache Http Server 2.4.7 Version Details Vulnerabilities
7 Application Apache Http Server 2.4.9 Version Details Vulnerabilities
8 Application Apache Http Server 2.4.10 Version Details Vulnerabilities
9 Application Apache Http Server 2.4.12 Version Details Vulnerabilities
10 Application Apache Http Server 2.4.16 Version Details Vulnerabilities
11 Application Apache Http Server 2.4.17 Version Details Vulnerabilities
12 Application Apache Http Server 2.4.18 Version Details Vulnerabilities
13 Application Apache Http Server 2.4.20 Version Details Vulnerabilities
14 Application Apache Http Server 2.4.23 Version Details Vulnerabilities
15 Application Apache Http Server 2.4.25 Version Details Vulnerabilities
16 Application Apache Http Server 2.4.26 Version Details Vulnerabilities
17 Application Apache Http Server 2.4.27 Version Details Vulnerabilities
18 Application Apache Http Server 2.4.28 Version Details Vulnerabilities
19 Application Apache Http Server 2.4.29 Version Details Vulnerabilities
20 OS Canonical Ubuntu Linux 14.04 ~~lts~~~ Version Details Vulnerabilities
21 OS Canonical Ubuntu Linux 16.04 ~~lts~~~ Version Details Vulnerabilities
22 OS Canonical Ubuntu Linux 17.10 Version Details Vulnerabilities
23 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
24 OS Debian Debian Linux 9.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Http Server 19
Canonical Ubuntu Linux 3
Debian Debian Linux 2

- References For CVE-2017-15710

http://www.securityfocus.com/bid/103512
BID 103512 Apache HTTP Server CVE-2017-15710 Denial of Service Vulnerability Release Date:2018-03-21
https://usn.ubuntu.com/3627-1/
UBUNTU USN-3627-1
https://httpd.apache.org/security/vulnerabilities_24.html CONFIRM
https://usn.ubuntu.com/3627-2/
UBUNTU USN-3627-2
http://www.openwall.com/lists/oss-security/2018/03/24/8
MLIST [oss-security] 20180323 CVE-2017-15710: Out of bound write in mod_authnz_ldap when using too small Accept-Language values
https://www.debian.org/security/2018/dsa-4164
DEBIAN DSA-4164
http://www.securitytracker.com/id/1040569
SECTRACK 1040569

- Metasploit Modules Related To CVE-2017-15710

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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