U radu programskog paketa DHCP ispravljena su 3 sigurnosna propusta. Spomenute ranjivosti udaljeni napadač može iskoristiti za izvođenje napada uskraćivanjem usluge (eng. Denial of Service, DoS).
| Paket: | dhcp 4.x |
| Operacijski sustavi: | Mandriva Linux 2011, Mandriva Linux Enterprise Server 5.0 |
| Problem: | neodgovarajuće rukovanje memorijom, pogreška u programskoj komponenti, preljev međuspremnika |
| Iskorištavanje: | udaljeno |
| Posljedica: | uskraćivanje usluga (DoS) |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2012-3570, CVE-2012-3571, CVE-2012-3954 |
| Izvorni ID preporuke: | MDVSA-2012:115 |
| Izvor: | Mandriva |
| Problem: | |
| Ranjivosti su posljedica curenja memorije, nepravilnog rukovanja oštećenim identifikatorima klijenata te preljeva međuspremnika. |
|
| Posljedica: | |
| Nedostatke je moguće iskoristiti za DoS (eng. Denial of Service) napad. |
|
| Rješenje: | |
| Svim korisnicima se savjetuje korištenje službene programske nadogradnje. |
|
Izvorni tekst preporuke
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
_______________________________________________________________________
Mandriva Linux Security Advisory MDVSA-2012:115
http://www.mandriva.com/security/
_______________________________________________________________________
Package : dhcp
Date : July 26, 2012
Affected: 2011.
_______________________________________________________________________
Problem Description:
Multiple vulnerabilities has been discovered and corrected in ISC DHCP:
An unexpected client identifier parameter can cause the ISC DHCP
daemon to segmentation fault when running in DHCPv6 mode, resulting
in a denial of service to further client requests. In order to exploit
this condition, an attacker must be able to send requests to the DHCP
server (CVE-2012-3570
An error in the handling of malformed client identifiers can cause
a DHCP server running affected versions (see Impact) to enter a
state where further client requests are not processed and the server
process loops endlessly, consuming all available CPU cycles. Under
normal circumstances this condition should not be triggered, but a
non-conforming or malicious client could deliberately trigger it in
a vulnerable server. In order to exploit this condition an attacker
must be able to send requests to the DHCP server (CVE-2012-3571
Two memory leaks have been found and fixed in ISC DHCP. Both are
reproducible when running in DHCPv6 mode (with the -6 command-line
argument.) The first leak is confirmed to only affect servers
operating in DHCPv6 mode, but based on initial code analysis the
second may theoretically affect DHCPv4 servers (though this has not
been demonstrated.) (CVE-2012-3954).
The updated packages have been upgraded to the latest version
(4.2.4-P1) which is not affected by these issues.
_______________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3570
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3571
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3954
_______________________________________________________________________
Updated Packages:
Mandriva Linux 2011:
5153e3eb1b4ceca9f800544d13ef6872
2011/i586/dhcp-client-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
8c6117c838ec86e12abe5ea1efa12f85
2011/i586/dhcp-common-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
03dd3ee3fe46a4bc255a20bc0a3f4edd
2011/i586/dhcp-devel-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
e6fb5efee36e445626e3e52314cb24e1
2011/i586/dhcp-doc-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
4da38e33e8542ae24e59f475a216dc88
2011/i586/dhcp-relay-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
af313c55824cd839740cd03556b43650
2011/i586/dhcp-server-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
c6766b7bfe76fbbbfe19df2a08863c47 2011/SRPMS/dhcp-4.2.4-0.P1.1.1.src.rpm
Mandriva Linux 2011/X86_64:
d59247271566158ed3ce91748e8bd244
2011/x86_64/dhcp-client-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
66e0771c5304de4550560bd39aa40f77
2011/x86_64/dhcp-common-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
37d678da37bb3b21a14a1e68619342de
2011/x86_64/dhcp-devel-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
5311a79668ab721cd829061f48dbbf39
2011/x86_64/dhcp-doc-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
5c59c00623d6b3a3a2130a5a467a9d33
2011/x86_64/dhcp-relay-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
cc93817435d581230d1e7fcee425abb3
2011/x86_64/dhcp-server-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
c6766b7bfe76fbbbfe19df2a08863c47 2011/SRPMS/dhcp-4.2.4-0.P1.1.1.src.rpm
_______________________________________________________________________
To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:
gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98
You can view other update advisories for Mandriva Linux at:
http://www.mandriva.com/security/advisories
If you want to report vulnerabilities, please contact
security_(at)_mandriva.com
_______________________________________________________________________
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
_______________________________________________________________________
Mandriva Linux Security Advisory MDVSA-2012:116
http://www.mandriva.com/security/
_______________________________________________________________________
Package : dhcp
Date : July 26, 2012
Affected: Enterprise Server 5.0
_______________________________________________________________________
Problem Description:
Multiple vulnerabilities has been discovered and corrected in ISC DHCP:
An error in the handling of malformed client identifiers can cause
a DHCP server running affected versions (see Impact) to enter a
state where further client requests are not processed and the server
process loops endlessly, consuming all available CPU cycles. Under
normal circumstances this condition should not be triggered, but a
non-conforming or malicious client could deliberately trigger it in
a vulnerable server. In order to exploit this condition an attacker
must be able to send requests to the DHCP server (CVE-2012-3571).
Two memory leaks have been found and fixed in ISC DHCP. Both are
reproducible when running in DHCPv6 mode (with the -6 command-line
argument.) The first leak is confirmed to only affect servers
operating in DHCPv6 mode, but based on initial code analysis the
second may theoretically affect DHCPv4 servers (though this has not
been demonstrated.) (CVE-2012-3954).
The updated packages have been patched to correct these issues.
_______________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3571
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3954
_______________________________________________________________________
Updated Packages:
Mandriva Enterprise Server 5:
98ba7b30258cfd06bc7a19bd4757a183
mes5/i586/dhcp-client-4.1.2-0.7mdvmes5.2.i586.rpm
331d5e2d556f3877f16173d13ec68b5f
mes5/i586/dhcp-common-4.1.2-0.7mdvmes5.2.i586.rpm
1af957f584ba970e1842df8b292b9474
mes5/i586/dhcp-devel-4.1.2-0.7mdvmes5.2.i586.rpm
e6ee64358b5c5bca19e16e523a071711
mes5/i586/dhcp-doc-4.1.2-0.7mdvmes5.2.i586.rpm
39fb25199a18755c702a3e746b3bb8f4
mes5/i586/dhcp-relay-4.1.2-0.7mdvmes5.2.i586.rpm
f1da21f64e8867506447422ffd871195
mes5/i586/dhcp-server-4.1.2-0.7mdvmes5.2.i586.rpm
b1615f9c33a0cbb3e6e7e1e7ef04ee07 mes5/SRPMS/dhcp-4.1.2-0.7mdvmes5.2.src.rpm
Mandriva Enterprise Server 5/X86_64:
fb2e6ba527910d8ef4dd1f7a48f30356
mes5/x86_64/dhcp-client-4.1.2-0.7mdvmes5.2.x86_64.rpm
cf5be061e3c8870e70a54df491a7b329
mes5/x86_64/dhcp-common-4.1.2-0.7mdvmes5.2.x86_64.rpm
3f20bd4ffd8855696f76876994c286d8
mes5/x86_64/dhcp-devel-4.1.2-0.7mdvmes5.2.x86_64.rpm
c4fa73d255e097277d501e2fd008c145
mes5/x86_64/dhcp-doc-4.1.2-0.7mdvmes5.2.x86_64.rpm
ddb661502b75f6e6b454e369719961f1
mes5/x86_64/dhcp-relay-4.1.2-0.7mdvmes5.2.x86_64.rpm
89911babd5524527358b41a787136450
mes5/x86_64/dhcp-server-4.1.2-0.7mdvmes5.2.x86_64.rpm
b1615f9c33a0cbb3e6e7e1e7ef04ee07 mes5/SRPMS/dhcp-4.1.2-0.7mdvmes5.2.src.rpm
_______________________________________________________________________
To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:
gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98
You can view other update advisories for Mandriva Linux at:
http://www.mandriva.com/security/advisories
If you want to report vulnerabilities, please contact
security_(at)_mandriva.com
_______________________________________________________________________
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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