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Fencer Vulns
critical 10.0

CVE-2008-3529 in the critical feed json

Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers t…

published 2008-09-12 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-3515

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
23.4%
EPSS 23.4% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a long XML entity name.

Patch / fix

  • xmlsoft libxml2 2.7.0
  • apple safari 3.2.3, 4.0
  • apple iphone_os 3.0
  • apple mac_os_x 10.5.7
  • libxml2 Debian 14, Debian 13, Debian 12 2.6.32.dfsg-4

debian advisories DEBIAN-CVE-2008-3529

  • libxml2 RHEL 2.1 2.4.19-11.ent
  • libxml2-python RHEL 2.1 2.4.19-11.ent
  • libxml2 RHEL 3 2.5.10-13
  • libxml2 RHEL 4 2.6.16-12.5
  • libxml2 RHEL 5 2.6.26-2.1.2.6
  • libxml2-python RHEL 3 2.5.10-13
  • libxml2-python RHEL 4 2.6.16-12.5
  • libxml2-python RHEL 5 2.6.26-2.1.2.6

red hat advisories RHSA-2008:0886RHSA-2008:0884

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-2008-3529 updated

libxml2: long entity name heap buffer overflow

  • Red Hat Desktop version 3 libxml2 2.5.10-13, libxml2-python 2.5.10-13 Red Hat Enterprise Linux (v. 5 server) libxml2 2.6.26-2.1.2.6, libxml2-python 2.6.26-2.1.2.6
    fixed: vendor fix RHSA-2008:0884
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 libxml2 2.4.19-11.ent, libxml2-python 2.4.19-11.ent
    fixed: vendor fix RHSA-2008:0886
  • Red Hat Enterprise Linux AS version 3 libxml2 2.5.10-13, libxml2-python 2.5.10-13 Red Hat Enterprise Linux AS version 4 libxml2 2.6.16-12.5, libxml2-python 2.6.16-12.5 Red Hat Enterprise Linux Desktop (v. 5 client) libxml2 2.6.26-2.1.2.6, libxml2-python 2.6.26-2.1.2.6 Red Hat Enterprise Linux Desktop version 4 libxml2 2.6.16-12.5, libxml2-python 2.6.16-12.5 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) libxml2 2.6.26-2.1.2.6, libxml2-python 2.6.26-2.1.2.6
    fixed: vendor fix RHSA-2008:0884
  • Red Hat Enterprise Linux ES version 2.1 libxml2 2.4.19-11.ent, libxml2-python 2.4.19-11.ent
    fixed: vendor fix RHSA-2008:0886
  • Red Hat Enterprise Linux ES version 3 libxml2 2.5.10-13, libxml2-python 2.5.10-13 Red Hat Enterprise Linux ES version 4 libxml2 2.6.16-12.5, libxml2-python 2.6.16-12.5
    fixed: vendor fix RHSA-2008:0884
  • Red Hat Enterprise Linux WS version 2.1 libxml2 2.4.19-11.ent, libxml2-python 2.4.19-11.ent
    fixed: vendor fix RHSA-2008:0886
  • Red Hat Enterprise Linux WS version 3 libxml2 2.5.10-13, libxml2-python 2.5.10-13 Red Hat Enterprise Linux WS version 4 libxml2 2.6.16-12.5, libxml2-python 2.6.16-12.5
    fixed: vendor fix RHSA-2008:0884
  • Red Hat Linux Advanced Workstation 2.1 libxml2 2.4.19-11.ent, libxml2-python 2.4.19-11.ent
    fixed: vendor fix RHSA-2008:0886

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. Published
  2. First public exploit (EDB-8798)

Exploit prediction

23.37% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-8798 Apple Safari - RSS 'feed://' Buffer Overflow via libxml2 (PoC) dos, 2009-05-26

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns 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.