`CVE-2009-1955`

7.5 High Protected by RASP

Description

The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564.

CWE-776 · XML entity expansion

Exploitation Status

Working exploit published

A reviewed exploit catalogue carries this CVE. Somebody has published code a stranger can run.

CVSS E:P

CISA KEV not listed
CISA Vulnrichment no assessment published
Indexed PoC 1 indexed Published artifacts you can open, in Exploit-DB; first seen 2009-06-01.
EPSS 53% chance in 30 days A model prediction, not an observation. Higher than 99% of all scored CVEs.

Index	Artifact	Stars	First seen
Exploit-DB	Apache mod_dav / svn - Remote Denial of Service		2009-06-01

Index

Artifact

Stars

First seen

Exploit-DB

Apache mod_dav / svn - Remote Denial of Service

2009-06-01

Waratek Defense Posture

Protected by RASP

A Waratek agent blocks this today.

Applicable rule: Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-776: XML Entity Expansion) can be mitigated by an ARMR xxe security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

Protection full a general security rule for the vulnerability class — xxe
Action available security rule
Review automated inferred
Record active

Decided by secure-rule-match : A vulnerability class already blocked by an ARMR security rule

Finding Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-776: XML Entity Expansion) can be mitigated by an ARMR xxe security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

Decided by	`secure-rule-match` : A vulnerability class already blocked by an ARMR security rule
Finding	Promoted to MITIGATED-BY-RASP (security rule): this CVE's weakness (CWE-776: XML Entity Expansion) can be mitigated by an ARMR xxe security rule that blocks this class of attack at the JVM level, without requiring a CVE-specific patch.

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

VRT selects the newest version's highest entry and publishes it as cvssScore, newest rather than largest because scores are not comparable across versions, and highest rather than first because the first entry is frequently a CNA placeholder scoring 0.0 over NVD's own analysis.

Version Score Band Vector Assigner Type

CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published

CVSS 2.0 5.0 no band published AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`	NVD	Primary	published
CVSS 2.0	5.0	no band published	`AV:N/AC:L/Au:N/C:N/I:N/A:P`	NVD	Primary

Affected Software & Releases

🏛️ Oracle CPU Advisories & Products

Advisory	Type	Quarter	Products Oracle named in risk matrix
Oracle Critical Patch Update April 2013 ↗	CPU	2013-Q2	Oracle Fusion Middleware / Web Listener (-)

Advisory

Type

Quarter

Products Oracle named in risk matrix

Oracle Critical Patch Update April 2013 ↗

CPU

2013-Q2

Oracle Fusion Middleware / Web Listener (-)

Indexed Oracle Components & Versions

Family	Component	Oracle's version cell (verbatim)	Indexed as
Oracle Fusion Middleware	Web Listener	-

Family

Component

Oracle's version cell (verbatim)

Indexed as

Oracle Fusion Middleware

Web Listener

🖥️ Product CPEs & Version Ranges

8 product(s) over 13 version claims (uncapped)

Source	Vendor	Product	Scheme	Affected Versions
nvd	apache	apr-util	generic	＜ 1.3.7
nvd	apache	http server	generic	≥ 2.2.0 and ＜ 2.2.12
nvd	apple	mac os x	generic	＜ 10.6.2
nvd	canonical	ubuntu linux	generic	6.06 · 8.04 · 8.10 · 9.04
nvd	debian	debian linux	generic	4.0
nvd	fedoraproject	fedora	generic	9 · 10 · 11
nvd	oracle	http server	generic	any version
nvd	suse	linux enterprise server	generic	9

Source

Vendor

Product

Scheme

Affected Versions

nvd

apache

apr-util

generic

＜ 1.3.7

nvd

apache

http server

generic

≥ 2.2.0 and ＜ 2.2.12

nvd

apple

mac os x

generic

＜ 10.6.2

nvd

canonical

ubuntu linux

generic

6.06 · 8.04 · 8.10 · 9.04

nvd

debian

debian linux

generic

4.0

nvd

fedoraproject

fedora

generic

9 · 10 · 11

nvd

oracle

http server

generic

any version

nvd

suse

linux enterprise server

generic

References

URL	Tags
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html	Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html	Mailing List, Third Party Advisory
http://marc.info/?l=apr-dev&m=124396021826125&w=2	Mailing List, Patch
http://marc.info/?l=bugtraq&m=129190899612998&w=2	Mailing List
http://secunia.com/advisories/34724	Broken Link, Third Party Advisory
http://secunia.com/advisories/35284	Broken Link, Third Party Advisory
http://secunia.com/advisories/35360	Broken Link, Third Party Advisory
http://secunia.com/advisories/35395	Broken Link, Third Party Advisory
http://secunia.com/advisories/35444	Broken Link, Third Party Advisory
http://secunia.com/advisories/35487	Broken Link, Third Party Advisory

URL

Timeline

Published 2009-06-08 Last modified 2026-06-16

Published	2009-06-08	By the CVE Program.
NVD record modified	2026-06-16	NVD's own last-modified date for this record.

Published

2009-06-08

By the CVE Program.

NVD record modified

2026-06-16

NVD's own last-modified date for this record.

Pipeline policy audit (17 of 21 rules evaluated)

17 of 21 rules ran. The rest were never reached, because an earlier stage settled the CVE, a distinct claim from a rule that ran and found nothing.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? first match wins

1 rejected no-match CVE Program withdrawal of this identifier

scope: Is the vulnerability ARMR's to address? first match wins

2 armr-patch-file no-match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no-match An ARMR security-rule template on disk for this CVE

4 manual-classification no-match A researcher's recorded decision for this specific CVE

5 manual classification no-match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no-match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no-match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the native WebLogic proxy plug-in. Oracle gives these no CPE of their own and names them only in the description.

8 osv-maven no-match An OSV.dev record of this CVE affecting a package published to Maven Central

9 cna-maven-package no-match An affected Maven artifact named by the CNA itself

10 known-cpe-product matched Queued for review Matches known products: oracle/http_server

11 cna-cpe-product not-reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

12 oracle-advisory-family not-reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

13 non-deployable-product not-reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

14 unmatched-product not-reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? cumulative: every rule gets a turn

15 patch-hint no-match A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

16 open-source-maven no-match The affected package being open source on Maven, so the fix can be read

17 poc-derivable matched Mitigation candidate 1 public PoC(s) indexed in exploit-db, with no public source. The exploit is a starting point for deriving an ARMR patch rule by reverse engineering; nothing here establishes a hook point exists.

18 no-exploit skipped With no fix path, a public exploit, or a CISA record of one

19 secure-rule-match decided it matched Protected by RASP CWE-776 (XML Entity Expansion) is mitigable by an ARMR xxe security rule.

20 below-action-threshold skipped Medium or Low severity, no KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

21 no-exploit-published skipped A published working exploit for this candidate, not only a proof of concept, a forecast, or nothing at all

What the scope rules read

The products the record named, and whether known-products.yaml tracks them. This is the evidence the scope stage decided on.

Vendor Product Tracked CPE Source

apache apr-util not tracked cpe:2.3:a:apache:apr-util:*:*:*:*:*:*:*:*

apple mac_os_x not tracked cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

suse linux_enterprise_server not tracked cpe:2.3:o:suse:linux_enterprise_server:9:*:*:*:*:*:*:*

debian debian_linux not tracked cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*

canonical ubuntu_linux not tracked cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*

fedoraproject fedora not tracked cpe:2.3:o:fedoraproject:fedora:9:*:*:*:*:*:*:*

oracle http_server tracked cpe:2.3:a:oracle:http_server:-:*:*:*:*:*:*:* yaml

apache http_server not tracked cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

Raw stored JSON document for this CVE ↗ · NVD ↗ · CVE.org ↗