Multiple vulnerabilities in git.kernel linux-pam

1) Input validation error

EUVDB-ID: #VU45410

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-4708

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The pam_env module in Linux-PAM (aka pam) 1.1.2 and earlier reads the .pam_environment file in a user's home directory, which might allow local users to run programs with an unintended environment by executing a program that relies on the pam_env PAM check.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 0.99.1.0 - 1.1.1

External links

http://openwall.com/lists/oss-security/2010/09/27/7
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env/pam_env.8.xml?r1=1.7&r2=1.8
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_env/pam_env.c?r1=1.22&r2=1.23
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.securityfocus.com/bid/46046
http://bugzilla.redhat.com/show_bug.cgi?id=641335
http://exchange.xforce.ibmcloud.com/vulnerabilities/65037

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU45411

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-4706

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The pam_sm_close_session function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) 1.1.2 and earlier does not properly handle a failure to determine a certain target uid, which might allow local users to delete unintended files by executing a program that relies on the pam_xauth PAM check.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 0.99.1.0 - 1.1.1

External links

http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=Linux-PAM-1_1_2-3-g05dafc06cd3dfeb7c4b24942e4e1ae33ff75a123
http://openwall.com/lists/oss-security/2010/10/03/1
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.securityfocus.com/bid/46045
http://exchange.xforce.ibmcloud.com/vulnerabilities/65035

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource management error

EUVDB-ID: #VU45412

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-4707

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The check_acl function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) 1.1.2 and earlier does not verify that a certain ACL file is a regular file, which might allow local users to cause a denial of service (resource consumption) via a special file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 0.99.1.0 - 1.1.1

External links

http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=Linux-PAM-1_1_2-2-gffe7058c70253d574b1963c7c93002bd410fddc9
http://openwall.com/lists/oss-security/2010/10/03/1
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.securityfocus.com/bid/46045
http://exchange.xforce.ibmcloud.com/vulnerabilities/65036

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Input validation error

EUVDB-ID: #VU45414

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-3853

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

pam_namespace.c in the pam_namespace module in Linux-PAM (aka pam) before 1.1.3 uses the environment of the invoking application or service during execution of the namespace.init script, which might allow local users to gain privileges by running a setuid program that relies on the pam_namespace PAM check, as demonstrated by the sudo program.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 0.99.1.0 - 1.1.1

External links

http://lists.vmware.com/pipermail/security-announce/2011/000126.html
http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/modules/pam_namespace/pam_namespace.c?view=log#rev1.13
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.mandriva.com/security/advisories?name=MDVSA-2010:220
http://www.redhat.com/support/errata/RHSA-2010-0819.html
http://www.redhat.com/support/errata/RHSA-2010-0891.html
http://www.securityfocus.com/archive/1/516909/100/0/threaded
http://www.vmware.com/security/advisories/VMSA-2011-0004.html
http://www.vupen.com/english/advisories/2011/0606
http://bugzilla.redhat.com/show_bug.cgi?id=643043

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.