Amazon Linux AMI update for glibc

Published: 2012-02-02

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2009-5029 CVE-2011-4609
CWE-ID	CWE-20 CWE-399
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU42856

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2009-5029

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the __tzfile_read function in glibc before 2.15 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted timezone (TZ) file, as demonstrated using vsftpd.

Mitigation

Update the affected packages:

i686:
    glibc-debuginfo-common-2.12-1.47.32.amzn1.i686
    glibc-common-2.12-1.47.32.amzn1.i686
    glibc-debuginfo-2.12-1.47.32.amzn1.i686
    glibc-devel-2.12-1.47.32.amzn1.i686
    glibc-2.12-1.47.32.amzn1.i686
    glibc-utils-2.12-1.47.32.amzn1.i686
    nscd-2.12-1.47.32.amzn1.i686
    glibc-headers-2.12-1.47.32.amzn1.i686
    glibc-static-2.12-1.47.32.amzn1.i686

src:
    glibc-2.12-1.47.32.amzn1.src

x86_64:
    glibc-devel-2.12-1.47.32.amzn1.x86_64
    glibc-static-2.12-1.47.32.amzn1.x86_64
    glibc-debuginfo-common-2.12-1.47.32.amzn1.x86_64
    glibc-utils-2.12-1.47.32.amzn1.x86_64
    glibc-common-2.12-1.47.32.amzn1.x86_64
    glibc-headers-2.12-1.47.32.amzn1.x86_64
    glibc-2.12-1.47.32.amzn1.x86_64
    glibc-debuginfo-2.12-1.47.32.amzn1.x86_64
    nscd-2.12-1.47.32.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2012-39.html

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. However, proof of concept for this vulnerability is available.

2) Resource management error

EUVDB-ID: #VU42857

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4609

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No