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CVE-2009-5029

34
FAUCET Score

CVE-2009-5029 describes an integer overflow vulnerability in the __tzfile_read function of glibc versions prior to 2.15. This flaw allows attackers to trigger a denial of service or potentially execute arbitrary code by supplying a specially crafted timezone file, as demonstrated with vsftpd. With a CVSS score of 6.8, this vulnerability is moderately severe, requiring medium attack complexity and potentially leading to partial confidentiality, integrity, and availability compromise. While not in the KEV catalog, an exploit (EDB-36404) exists, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.14CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:2.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:2.0.2:*:*:*:*:*:*:*
2.0.3CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:2.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.07%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-36404 · Jun 1, 2009
This CVE's current EPSS score of 0.0807 is in the 93rd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: glibc-0:2.3.4-2.57
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: glibc-0:2.5-65.el5_7.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: glibc-0:2.12-1.47.el6_2.5
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: compat-glibc
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: compat-glibc
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: compat-glibc

Vendor Advisories (1)

redhatCVE-2009-5029Moderate

glibc: __tzfile_read integer overflow to buffer overflow

Jun 1, 2009

References

dividead.wordpress.com / 2009/06/01/glibc-timezone-integer-overflow
Exploit
lists.grok.org.uk / pipermail/full-disclosure/2011-December/084452.html
bugzilla.redhat.com / show_bug.cgi
sourceware.org / git
sourceware.org / ml/libc-alpha/2011-12/msg00037.html
Exploit