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Fencer Intel
medium 6.8

CVE-2009-5029 json

Integer overflow in the __tzfile_read function in glibc before 2.15 allows context-dependent attackers to cause a denial of service (crash)…

published 13y ago modified 4mo ago also EUVD-2009-4987

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.8%
EPSS 8.8% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • glibc Debian 14, Debian 13, Debian 12 2.13-24

debian advisories DEBIAN-CVE-2009-5029

  • glibc RHEL 5 2.5-65.el5_7.3
  • nscd RHEL 5 2.5-65.el5_7.3
  • glibc-utils RHEL 5 2.5-65.el5_7.3
  • glibc-common RHEL 5 2.5-65.el5_7.3
  • glibc-debuginfo-common RHEL 5 2.5-65.el5_7.3
  • glibc RHEL 4 2.3.4-2.57
  • nscd RHEL 4 2.3.4-2.57
  • glibc-utils RHEL 4 2.3.4-2.57

red hat advisories RHSA-2012:0126RHSA-2012:0125RHSA-2012:0058

  • glibc openSUSE Tumbleweed 2.24-2.3

opensuse advisories openSUSE-SU-2024:10154-1

Is CVE-2009-5029 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-5029 updated cvss 6.5

glibc: __tzfile_read integer overflow to buffer overflow

  • Red Hat Enterprise Linux 4 compat-glibc Red Hat Enterprise Linux 5 compat-glibc Red Hat Enterprise Linux 6 compat-glibc
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) nscd 2.5-65.el5_7.3, glibc 2.5-65.el5_7.3, glibc-utils 2.5-65.el5_7.3, glibc-common 2.5-65.el5_7.3, glibc-debuginfo-common 2.5-65.el5_7.3
    fixed: vendor fix RHSA-2012:0126
  • Red Hat Enterprise Linux AS version 4 nscd 2.3.4-2.57, glibc 2.3.4-2.57, glibc-utils 2.3.4-2.57, glibc-common 2.3.4-2.57, glibc-profile 2.3.4-2.57, glibc-debuginfo-common 2.3.4-2.57
    fixed: vendor fix RHSA-2012:0125
  • Red Hat Enterprise Linux Desktop (v. 5 client) nscd 2.5-65.el5_7.3, glibc 2.5-65.el5_7.3, glibc-utils 2.5-65.el5_7.3, glibc-common 2.5-65.el5_7.3, glibc-debuginfo-common 2.5-65.el5_7.3
    fixed: vendor fix RHSA-2012:0126
  • Red Hat Enterprise Linux Desktop (v. 6) nscd 2.12-1.47.el6_2.5, glibc 2.12-1.47.el6_2.5, glibc-utils 2.12-1.47.el6_2.5, glibc-common 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux Desktop Optional (v. 6) glibc 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5
    fixed: vendor fix RHSA-2012:0058
  • Red Hat Enterprise Linux Desktop version 4 nscd 2.3.4-2.57, glibc 2.3.4-2.57, glibc-utils 2.3.4-2.57, glibc-common 2.3.4-2.57, glibc-profile 2.3.4-2.57, glibc-debuginfo-common 2.3.4-2.57 Red Hat Enterprise Linux ES version 4 nscd 2.3.4-2.57, glibc 2.3.4-2.57, glibc-utils 2.3.4-2.57, glibc-common 2.3.4-2.57, glibc-profile 2.3.4-2.57, glibc-debuginfo-common 2.3.4-2.57
    fixed: vendor fix RHSA-2012:0125
  • Red Hat Enterprise Linux HPC Node (v. 6) nscd 2.12-1.47.el6_2.5, glibc 2.12-1.47.el6_2.5, glibc-utils 2.12-1.47.el6_2.5, glibc-common 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux HPC Node Optional (v. 6) glibc 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux Server (v. 6) nscd 2.12-1.47.el6_2.5, glibc 2.12-1.47.el6_2.5, glibc-utils 2.12-1.47.el6_2.5, glibc-common 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux Server Optional (v. 6) glibc 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux Workstation (v. 6) nscd 2.12-1.47.el6_2.5, glibc 2.12-1.47.el6_2.5, glibc-utils 2.12-1.47.el6_2.5, glibc-common 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5 Red Hat Enterprise Linux Workstation Optional (v. 6) glibc 2.12-1.47.el6_2.5, glibc-debuginfo-common 2.12-1.47.el6_2.5
    fixed: vendor fix RHSA-2012:0058
  • Red Hat Enterprise Linux WS version 4 nscd 2.3.4-2.57, glibc 2.3.4-2.57, glibc-utils 2.3.4-2.57, glibc-common 2.3.4-2.57, glibc-profile 2.3.4-2.57, glibc-debuginfo-common 2.3.4-2.57
    fixed: vendor fix RHSA-2012:0125

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-36404)
  2. Published

Exploit prediction

8.76% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-36404 GNU glibc - Timezone Parsing Remote Integer Overflow dos, 2009-06-01
  • sourceware.org http://sourceware.org/ml/libc-alpha/2011-12/msg00037.html referenced PoC, tagged "exploit" by a source, unverified
  • dividead.wordpress.com http://dividead.wordpress.com/2009/06/01/glibc-timezone-integer-overflow/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.