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AUSCERT External Security Bulletin Redistribution
ESB-2019.3957
Multiple vulnerabilities in the IBM i HTTP Server affect IBM i.
25 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM i
Publisher: IBM
Operating System: IBM i
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10098 CVE-2019-10097 CVE-2019-10092
CVE-2019-10082 CVE-2019-10081 CVE-2019-9517
Reference: ESB-2019.3798
ESB-2019.3606
ESB-2019.3408
ESB-2019.3243.3
Original Bulletin:
https://www.ibm.com/support/pages/node/1097703
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Multiple vulnerabilities in the IBM i HTTP Server affect IBM i.
Security Bulletin
Summary
HTTP Server is supported by IBM i. IBM i has addressed the applicable CVEs.
Vulnerability Details
CVEID: CVE-2019-9517
DESCRIPTION: Multiple vendors are vulnerable to a denial of service, caused by
an Internal Data Buffering attack. By opening the HTTP/2 window so the peer can
send without constraint and sending a stream of requests for a large response
object, a remote attacker could consume excessive CPU resources.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165183 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-10081
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused by
a memory corruption on early pushes in the mod_http2 module. By sending a
specially crafted request, a remote attacker could exploit this vulnerability
to cause a crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165369 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2019-10082
DESCRIPTION: Apache HTTP Server could allow a remote attacker to obtain
sensitive information, caused by a read-after-free in the mod_http2 module
during connection shutdown. By sending specially crafted input, a remote
attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165368 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2019-10092
DESCRIPTION: Apache HTTP Server is vulnerable to cross-site scripting, caused
by improper validation of user-supplied input by the mod_proxy error page. A
remote attacker could cause the link on the error page to be malfomed and
instead point to a page of their choice. An attacker could use this
vulnerability to steal the victim''s cookie-based authentication credentials.
CVSS Base Score: 4.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165367 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N)
CVEID: CVE-2019-10097
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused by
a stack-based buffer overflow and a NULL pointer dereference in the
mod_remoteip module. By sending a specially crafted PROXY header, a remote
attacker could exploit this vulnerability to overflow a buffer and cause a
denial of service.
CVSS Base Score: 5.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165365 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
CVEID: CVE-2019-10098
DESCRIPTION: Apache HTTP Server could allow a remote attacker to conduct
phishing attacks, caused by an open redirect vulnerability in the mod_rewrite
module. An attacker could exploit this vulnerability using a specially-crafted
URL to redirect a victim to arbitrary Web sites.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
165366 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
Affected Products and Versions
Releases 7.4, 7.3, and 7.2 of IBM i are affected.
Remediation/Fixes
The issue can be fixed by applying a PTF to IBM i.
Releases 7.4, 7.3 and 7.2 of IBM i are supported and will be fixed.
The IBM i PTF numbers are:
+--------------+---------+------------+------------+
| |IBM i 7.4| IBM i 7.3 | IBM i 7.2 |
+--------------+---------+------------+------------+
|CVE-2019-9517 |SI70961 |SI70970 |Not affected|
+--------------+---------+------------+------------+
|CVE-2019-10081|SI70961 |SI70970 |Not affected|
+--------------+---------+------------+------------+
|CVE-2019-10082|SI70961 |SI70970 |Not affected|
+--------------+---------+------------+------------+
|CVE-2019-10098|SI71097 |SI71052 |SI71028 |
+--------------+---------+------------+------------+
|CVE-2019-10092|SI71097 |SI71052 |SI71028 |
+--------------+---------+------------+------------+
|CVE-2019-10097|SI71097 |Not affected|Not affected|
+--------------+---------+------------+------------+
https://www-945.ibm.com/support/fixcentral/
Important note: IBM recommends that all users running unsupported versions of
affected products upgrade to supported and fixed version of affected products.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
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