CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
EPSS
Percentile
0.4%
There is a race condition in the MALLOCDEBUG debugging component of the malloc subsystem in the library libc.a. A local user can exploit this race condition when executing setuid root programs and thereby overwrite any file in the system.
The successful exploitation of this vulnerability allows a local user to overwrite arbitrary files and execute arbitrary code as the root user.
The following libraries are vulnerable :
/usr/ccs/lib/libc.a /usr/ccs/lib/libp/libc.a.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The text in the description was extracted from AIX Security
# Advisory libc_advisory.asc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(64330);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/21");
script_cve_id("CVE-2009-1786");
script_name(english:"AIX 5.3 TL 0 : libc (IZ50500)");
script_summary(english:"Check for APAR IZ50500");
script_set_attribute(
attribute:"synopsis",
value:"The remote AIX host is missing a security patch."
);
script_set_attribute(
attribute:"description",
value:
"There is a race condition in the MALLOCDEBUG debugging component of
the malloc subsystem in the library libc.a. A local user can exploit
this race condition when executing setuid root programs and thereby
overwrite any file in the system.
The successful exploitation of this vulnerability allows a local user
to overwrite arbitrary files and execute arbitrary code as the root
user.
The following libraries are vulnerable :
/usr/ccs/lib/libc.a /usr/ccs/lib/libp/libc.a."
);
script_set_attribute(
attribute:"see_also",
value:"https://aix.software.ibm.com/aix/efixes/security/libc_advisory.asc"
);
script_set_attribute(
attribute:"solution",
value:"Install the appropriate interim fix."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
script_cwe_id(362);
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:5.3");
script_set_attribute(attribute:"vuln_publication_date", value:"2009/05/19");
script_set_attribute(attribute:"patch_publication_date", value:"2009/05/19");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/30");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2023 Tenable Network Security, Inc.");
script_family(english:"AIX Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("aix.inc");
include("misc_func.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX");
if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
if ( get_kb_item("Host/AIX/emgr_failure" ) ) exit(0, "This iFix check is disabled because : "+get_kb_item("Host/AIX/emgr_failure") );
flag = 0;
if (aix_check_ifix(release:"5.3", ml:"00", patch:"IZ50500_06", package:"bos.rte.libc", minfilesetver:"5.3.0.0", maxfilesetver:"5.3.0.71") < 0) flag++;
if (aix_check_ifix(release:"5.3", ml:"00", patch:"IZ50500_06", package:"bos.adt.prof", minfilesetver:"5.3.0.0", maxfilesetver:"5.3.0.71") < 0) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");