The checkpoint and restart feature in the kernel in IBM AIX 5.2, 5.3, and 6.1 does not properly protect kernel memory, which allows local users to read and modify portions of memory and gain privileges via unspecified vectors involving a restart of a 64-bit process, probably related to the as_getadsp64 function.

There are multiple vulnerabilities in the AIX kernel :

a) A 64-bit process that is restarted via the checkpoint and restart feature will gain read and write access to certain areas of kernel memory, resulting in execution of arbitrary code. Track with the following APAR numbers: IZ16992, IZ17111, IZ11820, IZ12794. 

b) Remote nodes of a concurrent volume group may crash after a single node reduces the size of a JFS2 filesystem residing on the concurrent volume group, resulting in a denial of service. Track with the following APAR numbers: IZ05246, IZ04953, IZ04946.

c) The proc filesystem does not enforce directory access controls correctly when the permission on a directory is more restrictive than permission on the currently executing file in that directory, resulting in information leakage.
Track with the following APAR numbers: IZ06022, IZ06663, IZ06505.

d) Trusted Execution fails to protect files when the modifications are made via hard links. Affects AIX 6.1 only.
Track with the following APAR number: IZ13418

e) Some WPAR specific system calls may cause undefined behavior, possibly resulting in a denial of service. Affects AIX 6.1 only. Track with the following APAR numbers:
IZ13392, IZ13346

f) A user with enough privileges to run ProbeVue can read from any kernel memory address, resulting in information leakage. Affects AIX 6.1 only. Track with the following APAR number: IZ09545

The following files are vulnerable :

/usr/lib/boot/unix_64 /usr/lib/boot/unix_mp /usr/lib/boot/unix_up /usr/lib/drivers/hd_pin /usr/sbin/lreducelv

The fixes below include the fixes for all of the above APARs.

ID	Name	Product	Family	Severity
64319	AIX 5.3 TL 0 : kernel (IZ17111)	Nessus	AIX Local Security Checks	high
64316	AIX 5.2 TL 0 : kernel (IZ16992)	Nessus	AIX Local Security Checks	high
64314	AIX 5.3 TL 7 : kernel (IZ11820)	Nessus	AIX Local Security Checks	high

Detections

Analytics

CVE-2008-1593

high

Tenable Plugins

high

high

high