CVE-2017-9789: Use After Free
apache. Multiple issues were addressed by updating to version 2.4.27.
Other sources
When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour.
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
macOS High Sierrato a version that resolves this vulnerability.Fixed in 10.13.1 - Upgrade
Upgrade
Apache httpdto a version that resolves this vulnerability.Fixed in 2.4.27
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2016-0736
- CVE-2016-2161
- CVE-2016-5387
- CVE-2016-8740
- CVE-2016-8743
- CVE-2017-3167
- CVE-2017-3169
- CVE-2017-7659
- CVE-2017-7668
- CVE-2017-7679
- CVE-2017-9788
- CVE-2017-9789
- CVE-2017-13786
- CVE-2017-13800
- CVE-2017-13809
- CVE-2017-13820
- CVE-2017-13807
- CVE-2017-13829
- CVE-2017-13833
- CVE-2017-13821
- CVE-2017-13825
- CVE-2017-1000100
- CVE-2017-1000101
- CVE-2017-13801
- CVE-2017-13815
- CVE-2017-13828
- CVE-2017-13811
- CVE-2017-13830
- CVE-2017-11103
- CVE-2017-13819
- CVE-2017-13814
- CVE-2017-13831
- CVE-2017-13906
- CVE-2017-13810
- CVE-2017-13817
- CVE-2017-13818
- CVE-2017-13836
- CVE-2017-13841
- CVE-2017-13840
- CVE-2017-13842
- CVE-2017-13782
- CVE-2017-13843
- CVE-2017-13834
- CVE-2017-13799
- CVE-2017-13852
- CVE-2017-13813
- CVE-2017-13812
- CVE-2016-4736
- CVE-2017-5969
- CVE-2017-5130
- CVE-2017-7376
- CVE-2017-9050
- CVE-2017-9049
- CVE-2018-4390
- CVE-2018-4391
- CVE-2017-13907
- CVE-2017-13824
- CVE-2017-13846
- CVE-2017-10140
- CVE-2017-13822
- CVE-2017-7132
- CVE-2017-13823
- CVE-2017-13808
- CVE-2017-13838
- CVE-2017-7170
- CVE-2017-7150
- CVE-2017-13908
- CVE-2017-13804
- CVE-2017-11108
- CVE-2017-11541
- CVE-2017-11542
- CVE-2017-11543
- CVE-2017-12893
- CVE-2017-12894
- CVE-2017-12895
- CVE-2017-12896
- CVE-2017-12897
- CVE-2017-12898
- CVE-2017-12899
- CVE-2017-12900
- CVE-2017-12901
- CVE-2017-12902
- CVE-2017-12985
- CVE-2017-12986
- CVE-2017-12987
- CVE-2017-12988
- CVE-2017-12989
- CVE-2017-12990
- CVE-2017-12991
- CVE-2017-12992
- CVE-2017-12993
- CVE-2017-12994
- CVE-2017-12995
- CVE-2017-12996
- CVE-2017-12997
- CVE-2017-12998
- CVE-2017-12999
- CVE-2017-13000
- CVE-2017-13001
- CVE-2017-13002
- CVE-2017-13003
- CVE-2017-13004
- CVE-2017-13005
- CVE-2017-13006
- CVE-2017-13007
- CVE-2017-13008
- CVE-2017-13009
- CVE-2017-13010
- CVE-2017-13011
- CVE-2017-13012
- CVE-2017-13013
- CVE-2017-13014
- CVE-2017-13015
- CVE-2017-13016
- CVE-2017-13017
- CVE-2017-13018
- CVE-2017-13019
- CVE-2017-13020
- CVE-2017-13021
- CVE-2017-13022
- CVE-2017-13023
- CVE-2017-13024
- CVE-2017-13025
- CVE-2017-13026
- CVE-2017-13027
- CVE-2017-13028
- CVE-2017-13029
- CVE-2017-13030
- CVE-2017-13031
- CVE-2017-13032
- CVE-2017-13033
- CVE-2017-13034
- CVE-2017-13035
- CVE-2017-13036
- CVE-2017-13037
- CVE-2017-13038
- CVE-2017-13039
- CVE-2017-13040
- CVE-2017-13041
- CVE-2017-13042
- CVE-2017-13043
- CVE-2017-13044
- CVE-2017-13045
- CVE-2017-13046
- CVE-2017-13047
- CVE-2017-13048
- CVE-2017-13049
- CVE-2017-13050
- CVE-2017-13051
- CVE-2017-13052
- CVE-2017-13053
- CVE-2017-13054
- CVE-2017-13055
- CVE-2017-13687
- CVE-2017-13688
- CVE-2017-13689
- CVE-2017-13690
- CVE-2017-13725
- CVE-2017-13077
- CVE-2017-13078
- CVE-2017-13080
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2017-9789.
What is the severity level of CVE-2017-9789?
The severity level of CVE-2017-9789 is high (7.5).
What is the affected software?
The affected software includes Apple macOS High Sierra 10.13.1, Apple Sierra, Apple El Capitan, and Apache HTTP server 2.4.26.
What is the description of CVE-2017-9789?
CVE-2017-9789 is a vulnerability in Apache httpd 2.4.26 that could result in potentially erratic behavior when closing many connections under stress.
How can I fix CVE-2017-9789?
To fix CVE-2017-9789, update to version 2.4.27 of Apache httpd.