CVE-2009-2699

The Solaris pollset feature in the Event Port backend in poll/unix/port.c in the Apache Portable Runtime (APR) library before 1.3.9, as used in the Apache HTTP Server before 2.2.14 and other products, does not properly handle errors, which allows remote attackers to cause a denial of service (daemon hang) via unspecified HTTP requests, related to the prefork and event MPMs.

Published: 2009-10-13 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2699 is rated Moderate Risk (63/100): CVSS High severity, with high exploitation likelihood (EPSS 9.28%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-2699

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-01 8.73% 9.28% +0.55%
2 2026-03-04 6.00% 8.73% +2.73%
3 2026-03-01 — 6.00% —

Full EPSS history (44 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2699

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-2699

OS Trackers for CVE-2009-2699

vendor priority summary link
debian unimportant CVE-2009-2699 unimportant priority: Debian including 1 source packages (apr), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-2699
redhat medium — https://access.redhat.com/security/cve/CVE-2009-2699
suse high CVE-2009-2699 severity important: SUSE including 81 source package names (apache2-2.2.34-70.12.1, apache2-2.4.10-6.1, …), 139 product×package rows across 28 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise Module for Server Applications 15, … (28 product lines)): Fixed 139. https://www.suse.com/security/cve/CVE-2009-2699/
ubuntu medium CVE-2009-2699 medium priority: Ubuntu including 1 source packages (apr), 5 status rows across 5 suites (dapper, hardy, intrepid, jaunty, upstream): not-affected 3, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2009-2699

Vendor comments (NVD) for CVE-2009-2699

  • Red Hat (2010-02-23T00:00:00)

    This flaw does not affect the version of APR shipped in Red Hat Enterprise Linux. This flaw affected JBoss Enterprise Web Server running on the Solaris platform. Updated httpd packages are available for download from Customer Support Portal: https://support.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=1.0.0

  • Apache (2010-01-21T00:00:00)

    Clarification 1: This issue only affects Solaris 10 and OpenSolaris. Other versions of Solaris and non-Solaris platforms are not affected. Clarification 2: This issue only affects 2.2.x versions of Apache HTTP Server, APR 1.1 through 1.3.8. APR 0.9.x is not affected.

Affected software / configurations for CVE-2009-2699

Vendor Product Version Raw CPE
apache http_server >= 2.2.0, < 2.2.14 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache portable_runtime < 1.3.9 cpe:2.3:a:apache:portable_runtime:*:*:*:*:*:*:*:*

References for CVE-2009-2699

URL Tags
http://marc.info/?l=bugtraq&m=133355494609819&w=2 Issue Tracking Mailing List Third Party Advisory
http://securitytracker.com/id?1022988 Broken Link Third Party Advisory VDB Entry
http://www.apache.org/dist/httpd/CHANGES_2.2.14 Broken Link Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 Broken Link
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html Third Party Advisory
http://www.securityfocus.com/bid/36596 Patch Third Party Advisory VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/53666 Third Party Advisory VDB Entry
https://issues.apache.org/bugzilla/show_bug.cgi?id=47645 Issue Tracking Vendor Advisory
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/rad2acee3ab838b52c04a0698b1728a9a43467bf365bd481c993c535d%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/reb7c64aeea604bf948467d9d1cab8ff23fa7d002be1964bcc275aae7%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E Mailing List Patch
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