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AUSCERT External Security Bulletin Redistribution
ESB-2019.4664
Security Bulletin: Multiple vulnerabilities in IBM Cloud
13 December 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Cloud
Publisher: IBM
Operating System: Linux variants
Impact/Access: Access Privileged Data -- Remote with User Interaction
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-9518 CVE-2019-9517 CVE-2019-9515
CVE-2019-9514 CVE-2019-9513 CVE-2019-9512
CVE-2014-3603
Reference: ESB-2018.1786.2
ESB-2016.0913
ESB-2016.0704
ESB-2016.0265
Original Bulletin:
https://www.ibm.com/support/pages/node/1128399
https://www.ibm.com/support/pages/node/1128387
Comment: This bulletin contains two (2) IBM security advisories.
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Man in the middle vulnerability in Liberty for Java for IBM Cloud
(CVE-2014-3603)
Security Bulletin
Summary
There is a man in the middle vulnerability in WebSphere Application Server
Liberty. This vulnerability has been addressed.
Vulnerability Details
CVEID: CVE-2014-3603
DESCRIPTION: The (1) HttpResource and (2) FileBackedHttpResource
implementations in Shibboleth Identity Provider (IdP) before 2.4.1 and OpenSAML
Java 2.6.2 do not verify that the server hostname matches a domain name in the
subject's Common Name (CN) or subjectAltName field of the X.509 certificate,
which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary
valid certificate.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
164271 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
Affected Products and Versions
+--------------------+----------+
|Affected Product(s) |Version(s)|
+--------------------+----------+
|Liberty for Java |3.37 |
+--------------------+----------+
Remediation/Fixes
To upgrade to Liberty for v3.39-20191121-1047 or higher, you must re-stage or
re-push your application.
To find the current version of Liberty for Java in IBM Cloud being used, from
the command-line Cloud Foundry client by running the following commands:
cf ssh <appname> -c cat "staging_info.yml"
Look for the following lines:
{"detected_buildpack":"Liberty for Java(TM) (WAR, liberty-18.0.0_3,
buildpack-v3.25-20180918-1034, ibmjdk-1.8.0_20180214, env)
","start_command":".liberty/initial_startup.rb"}
To re-stage your application using the command-line Cloud Foundry client, use
the following command:
cf restage <appname>
To re-push your application using the command-line Cloud Foundry client, use
the following command:
cf push <appname>
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
- -------------------------------------------------------------------------------
Multiple vulnerabilities in HTTP/2 implementation used by Liberty for Java for
IBM Cloud
Security Bulletin
Summary
There are multiple vulnerabilities in the HTTP/2 implementation that is used by
WebSphere Application Server Liberty. This affects the servlet-4.0 and
servlet-3.1 features. These vulnerabilities have been addressed.
Vulnerability Details
CVEID: CVE-2019-9515
DESCRIPTION: Some HTTP/2 implementations are vulnerable to a settings flood,
potentially leading to a denial of service. The attacker sends a stream of
SETTINGS frames to the peer. Since the RFC requires that the peer reply with
one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost
equivalent in behavior to a ping. Depending on how efficiently this data is
queued, this can consume excess CPU, memory, or both.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
165181 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-9518
DESCRIPTION: Some HTTP/2 implementations are vulnerable to a flood of empty
frames, potentially leading to a denial of service. The attacker sends a stream
of frames with an empty payload and without the end-of-stream flag. These
frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends
time processing each frame disproportionate to attack bandwidth. This can
consume excess CPU.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
164904 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-9517
DESCRIPTION: Some HTTP/2 implementations are vulnerable to unconstrained
interal data buffering, potentially leading to a denial of service. The
attacker opens the HTTP/2 window so the peer can send without constraint;
however, they leave the TCP window closed so the peer cannot actually write
(many of) the bytes on the wire. The attacker then sends a stream of requests
for a large response object. Depending on how the servers queue the responses,
this can consume excess memory, CPU, or both.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
165183 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-9512
DESCRIPTION: Some HTTP/2 implementations are vulnerable to ping floods,
potentially leading to a denial of service. The attacker sends continual pings
to an HTTP/2 peer, causing the peer to build an internal queue of responses.
Depending on how efficiently this data is queued, this can consume excess CPU,
memory, or both.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
164903 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-9514
DESCRIPTION: Some HTTP/2 implementations are vulnerable to a reset flood,
potentially leading to a denial of service. The attacker opens a number of
streams and sends an invalid request over each stream that should solicit a
stream of RST_STREAM frames from the peer. Depending on how the peer queues the
RST_STREAM frames, this can consume excess memory, CPU, or both.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
164640 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2019-9513
DESCRIPTION: Some HTTP/2 implementations are vulnerable to resource loops,
potentially leading to a denial of service. The attacker creates multiple
request streams and continually shuffles the priority of the streams in a way
that causes substantial churn to the priority tree. This can consume excess
CPU.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
164639 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
+--------------------+----------+
|Affected Product(s) |Version(s)|
+--------------------+----------+
|Liberty for Java |3.37 |
+--------------------+----------+
Remediation/Fixes
To upgrade to Liberty for v3.39-20191121-1047 or higher, you must re-stage or
re-push your application.
To find the current version of Liberty for Java in IBM Cloud being used, from
the command-line Cloud Foundry client by running the following commands:
cf ssh <appname> -c cat "staging_info.yml"
Look for the following lines:
{"detected_buildpack":"Liberty for Java(TM) (WAR, liberty-18.0.0_3,
buildpack-v3.25-20180918-1034, ibmjdk-1.8.0_20180214, env)
","start_command":".liberty/initial_startup.rb"}
To re-stage your application using the command-line Cloud Foundry client, use
the following command:
cf restage <appname>
To re-push your application using the command-line Cloud Foundry client, use
the following command:
cf push <appname>
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
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