Multiple vulnerabilities in git.kernel linux-pam



Published: 2011-01-24 | Updated: 2020-08-11
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2010-3430
CVE-2010-3431
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		linux-pam
Other software / Other software solutions

Vendor git.kernel.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU45416

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-2010-3430

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The privilege-dropping implementation in the (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) 1.1.2 does not perform the required setfsgid and setgroups system calls, which might allow local users to obtain sensitive information by leveraging unintended group permissions, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-3435.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 1.1.2

External links

http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=843807a3a90f52e7538be756616510730a24739a
http://openwall.com/lists/oss-security/2010/09/21/10
http://openwall.com/lists/oss-security/2010/09/21/3
http://openwall.com/lists/oss-security/2010/09/21/8
http://openwall.com/lists/oss-security/2010/09/21/9
http://openwall.com/lists/oss-security/2010/09/27/10
http://openwall.com/lists/oss-security/2010/09/27/4
http://openwall.com/lists/oss-security/2010/09/27/5
http://openwall.com/lists/oss-security/2010/09/27/7
http://openwall.com/lists/oss-security/2010/10/03/1
http://openwall.com/lists/oss-security/2010/10/25/2
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.openwall.com/lists/oss-security/2010/09/21/11
http://www.openwall.com/lists/oss-security/2010/09/24/2
http://bugzilla.redhat.com/show_bug.cgi?id=641361


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: #VU45417

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2010-3431

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The privilege-dropping implementation in the (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) 1.1.2 does not check the return value of the setfsuid system call, which might allow local users to obtain sensitive information by leveraging an unintended uid, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-3435.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-pam: 1.1.2

External links

http://git.altlinux.org/people/ldv/packages/?p=pam.git;a=commit;h=843807a3a90f52e7538be756616510730a24739a
http://openwall.com/lists/oss-security/2010/09/21/10
http://openwall.com/lists/oss-security/2010/09/21/3
http://openwall.com/lists/oss-security/2010/09/21/8
http://openwall.com/lists/oss-security/2010/09/21/9
http://openwall.com/lists/oss-security/2010/09/27/10
http://openwall.com/lists/oss-security/2010/09/27/4
http://openwall.com/lists/oss-security/2010/09/27/5
http://openwall.com/lists/oss-security/2010/09/27/7
http://openwall.com/lists/oss-security/2010/10/03/1
http://openwall.com/lists/oss-security/2010/10/25/2
http://secunia.com/advisories/49711
http://security.gentoo.org/glsa/glsa-201206-31.xml
http://www.openwall.com/lists/oss-security/2010/09/21/11
http://www.openwall.com/lists/oss-security/2010/09/24/2
http://bugzilla.redhat.com/show_bug.cgi?id=641361


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.



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