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AUSCERT External Security Bulletin Redistribution
ESB-2008.0209 -- [Solaris]
Security Vulnerability May Allow Firewall Compromise or
Creation of Denial of Service (DoS) Condition
4 March 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: Solaris Internet Protocol
Publisher: Sun Microsystems
Operating System: Solaris 10
Solaris 9
Solaris 8
Impact: Denial of Service
Reduced Security
Access: Existing Account
CVE Names: CVE-2008-1095
Revision History: March 4 2008: Added CVE
February 26 2008: Initial Release
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Solution Type Sun Alert
Solution 200183 : Security Vulnerability May Allow Firewall
Compromise or Creation of Denial of Service (DoS) Condition
Bug ID: 6240205
Product: Solaris 9 Operating System
Solaris 10 Operating System
Solaris 8 Operating System
Date of Resolved Release: 08-Feb-2008
SA Document Body
Security Vulnerability May Allow Firewall Compromise or Creation
of Denial of Service (DoS) Condition
1. Impact
A security vulnerability in Solaris Internet Protocol (IP - see
ip(7P)) implementation may allow a remote privileged user to
send certain packets bypassing the security policies set by a
firewall or to cause the system to panic, creating a Denial of
Service (DoS) condition.
Sun acknowledges, with thanks, Mark Dowd from IBM Internet
Security Systems X-Force (http://xforce.iss.net) for bringing
this issue to our attention.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 116965-30
* Solaris 9 without patch 114344-32
* Solaris 10 without patch 118822-27
x86 Platform
* Solaris 8 without patch 116966-29
* Solaris 9 without patch 119435-20
* Solaris 10 without patch 118844-28
3. Symptoms
There are no predictable symptoms that would indicate the policies
of a firewall have been circumvented. If the system panics due
to this issue, the following stack trace may be seen:
icmp_pkt_v6+0xxxxx
icmp_param_problem_v6+0xxxxx
ip_fanout_sec_proto+0xxxxx
ip_rput_local+0xxxxx
ip_rput+0xxxxx
putnext+0xxxxx
4. Workaround
To work around the described issues:
As "root," set the ndd(1M) variable "ip_reass_queue_bytes" to 0
by using the following command:
# ndd -set /dev/ip ip_reass_queue_bytes 0
This workaround will stop the system from re-assembling IP
fragments. Networks which send/receive fragmented IP packets
to/from the system will become unreachable.
Note: This workaround is not persistent across reboot.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 116965-30 or later
* Solaris 9 with patch 114344-32 or later
* Solaris 10 with patch 118822-27 or later
x86 Platform
* Solaris 8 with patch 116966-29 or later
* Solaris 9 with patch 119435-20 or later
* Solaris 10 with patch 118844-28 or later
For more information on Security Sun Alerts, see Sun Infodoc
91209.
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