Multiple vulnerabilities in GNU Glibc



| Updated: 2020-08-11
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
 Glibc
Universal components / Libraries / Libraries used by multiple products

Vendor GNU

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

Install update from vendor's website.

Vulnerable software versions

Glibc: 2.0 - 2.13

CPE2.3 External links

https://dividead.wordpress.com/2009/06/01/glibc-timezone-integer-overflow/
https://lists.grok.org.uk/pipermail/full-disclosure/2011-December/084452.html
https://sourceware.org/git/?p=glibc.git;a=commit;h=97ac2654b2d831acaa18a2b018b0736245903fd2
https://sourceware.org/ml/libc-alpha/2011-12/msg00037.html
https://bugzilla.redhat.com/show_bug.cgi?id=761245


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

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The svc_run function in the RPC implementation in glibc before 2.15 allows remote attackers to cause a denial of service (CPU consumption) via a large number of RPC connections.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Glibc: 2.0 - 2.13

CPE2.3 External links

https://bugzilla.redhat.com/show_bug.cgi?id=767299


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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