SUSE-SU-2018:1161-2: moderate: Security update for apache2

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for apache2
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:1161-2
Rating:             moderate
References:         #1086774 #1086775 #1086813 #1086814 #1086817 
                    #1086820 
Cross-References:   CVE-2017-15710 CVE-2017-15715 CVE-2018-1283
                    CVE-2018-1301 CVE-2018-1302 CVE-2018-1303
                    CVE-2018-1312
Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
______________________________________________________________________________

   An update that fixes 7 vulnerabilities is now available.

Description:

   This update for apache2 fixes the following issues:

     * CVE-2018-1283:  when mod_session is configured to forward its session
       data to CGI applications (SessionEnv on, not the default), a remote
       user may influence their content by using a \"Session\" header leading
       to unexpected behavior [bsc#1086814].

     * CVE-2018-1301: due to an out of bound access after a size limit being
       reached by reading the HTTP header, a specially crafted request could
       lead to remote denial of service. [bsc#1086817]

     * CVE-2018-1303: a specially crafted HTTP request header could lead to
       crash due to an out of bound read while preparing data to be cached in
       shared memory.[bsc#1086813]

     * CVE-2017-15715: a regular expression could match '$' to a newline
       character in a malicious filename, rather than matching only the end
       of the filename. leading to corruption of uploaded files.[bsc#1086774]

     * CVE-2018-1312: when generating an HTTP Digest authentication
       challenge, the nonce sent to prevent reply attacks was not correctly
       generated using a pseudo-random seed. In a cluster of servers using a
       common Digest authentication configuration, HTTP requests could be
       replayed across servers by an attacker without detection. [bsc#1086775]

     * CVE-2017-15710: 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. [bsc#1086820]

     * CVE-2018-1302: when an HTTP/2 stream was destroyed after being
       handled, it could have written a NULL pointer potentially to an
       already freed memory. The memory pools maintained by the server make
       this vulnerability hard to trigger in usual configurations, the
       reporter and the team could not reproduce it outside debug builds, so
       it is classified as low risk. [bsc#1086820]


Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server 12-SP2-BCL:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2018-803=1



Package List:

   - SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):

      apache2-2.4.23-29.18.2
      apache2-debuginfo-2.4.23-29.18.2
      apache2-debugsource-2.4.23-29.18.2
      apache2-example-pages-2.4.23-29.18.2
      apache2-prefork-2.4.23-29.18.2
      apache2-prefork-debuginfo-2.4.23-29.18.2
      apache2-utils-2.4.23-29.18.2
      apache2-utils-debuginfo-2.4.23-29.18.2
      apache2-worker-2.4.23-29.18.2
      apache2-worker-debuginfo-2.4.23-29.18.2

   - SUSE Linux Enterprise Server 12-SP2-BCL (noarch):

      apache2-doc-2.4.23-29.18.2


References:

   https://www.suse.com/security/cve/CVE-2017-15710.html
   https://www.suse.com/security/cve/CVE-2017-15715.html
   https://www.suse.com/security/cve/CVE-2018-1283.html
   https://www.suse.com/security/cve/CVE-2018-1301.html
   https://www.suse.com/security/cve/CVE-2018-1302.html
   https://www.suse.com/security/cve/CVE-2018-1303.html
   https://www.suse.com/security/cve/CVE-2018-1312.html
   https://bugzilla.suse.com/1086774
   https://bugzilla.suse.com/1086775
   https://bugzilla.suse.com/1086813
   https://bugzilla.suse.com/1086814
   https://bugzilla.suse.com/1086817
   https://bugzilla.suse.com/1086820