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CVE-2010-1623· NVD / CVE Program· CNA redhat

Memory leak in the apr_brigade_split_line function in buckets/apr_brigade.c in the Apache Portable Runtime Utility library (aka APR-util) be

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 20.3% (FIRST EPSS); higher than 97.4% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: apache2 (Debian:12) 2.2.16-3; apr-util (Debian:12) 1.3.9+dfsg-4; apr-util (Debian:5.0) 1.2.12+dfsg-8+lenny5.

Low priority for now. Upgrade to apache2 (Debian:12) 2.2.16-3; apr-util (Debian:12) 1.3.9+dfsg-4; apr-util (Debian:5.0) 1.2.12+dfsg-8+lenny5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Memory leak in the apr_brigade_split_line function in buckets/apr_brigade.c in the Apache Portable Runtime Utility library (aka APR-util) before 1.3.10, as used in the mod_reqtimeout module in the Apache HTTP Server and other software, allows remote attackers to cause a denial of service (memory consumption) via unspecified vectors related to the destruction of an APR bucket.

MediumCVSS 5.0 · v2.0—No exploit Fix available
Published
Oct 4, 2010
Updated
Jun 16, 2026
EPSS
20.3% · 97th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 20.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apacheapr-util
apachehttp server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache http server2.0.35 and later · before 2.0.64
  • apache http server2.2.0 and later · before 2.2.17

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12apache2before 2.2.16-32.2.16-3
Debian:12apr-utilbefore 1.3.9+dfsg-41.3.9+dfsg-4
Debian:5.0apr-utilbefore 1.2.12+dfsg-8+lenny51.2.12+dfsg-8+lenny5
openSUSE:Tumbleweedapache2before 2.4.23-4.12.4.23-4.1
openSUSE:Tumbleweedapr-utilbefore 1.6.1-8.11.6.1-8.1
openSUSE:Tumbleweedapr-utilbefore 1.5.4-4.41.5.4-4.4
Red Hat:enterprise_linux:4::asapr-utilbefore 0:0.9.4-22.el4_8.30:0.9.4-22.el4_8.3
Red Hat:enterprise_linux:4::asapr-util-debuginfobefore 0:0.9.4-22.el4_8.30:0.9.4-22.el4_8.3
Red Hat:enterprise_linux:4::asapr-util-develbefore 0:0.9.4-22.el4_8.30:0.9.4-22.el4_8.3
Red Hat:enterprise_linux:5::clientapr-util-docsbefore 0:1.2.7-11.el5_5.20:1.2.7-11.el5_5.2
Red Hat:enterprise_linux:5::clientapr-util-mysqlbefore 0:1.2.7-11.el5_5.20:1.2.7-11.el5_5.2
Red Hat:enterprise_linux:5::client_workstationapr-utilbefore 0:1.2.7-11.el5_5.20:1.2.7-11.el5_5.2
Red Hat:enterprise_linux:5::client_workstationapr-util-debuginfobefore 0:1.2.7-11.el5_5.20:1.2.7-11.el5_5.2
Red Hat:enterprise_linux:5::client_workstationapr-util-develbefore 0:1.2.7-11.el5_5.20:1.2.7-11.el5_5.2
Red Hat:enterprise_linux:6::clientapr-utilbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-debuginfobefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-develbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-ldapbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-mysqlbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-odbcbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-pgsqlbefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:enterprise_linux:6::clientapr-util-sqlitebefore 0:1.3.9-3.el6_0.10:1.3.9-3.el6_0.1
Red Hat:jboss_enterprise_web_server:1::el4antbefore 0:1.7.1-13.jdk6.ep5.el40:1.7.1-13.jdk6.ep5.el4
Red Hat:jboss_enterprise_web_server:1::el4antlrbefore 0:2.7.7-7.ep5.el40:2.7.7-7.ep5.el4

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-1955The 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 mod
    46Plan
  • CVE-2009-2412Multiple integer overflows in the Apache Portable Runtime (APR) library and the Apache Portable Utility library (aka APR-util) 0.9.x and 1.3
    44Plan
  • CVE-2026-34191Apache Portable Runtime Utility: SQL Injection in apr_dbd_oracle
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2009-0023Jun 7, 2009 · The apr_strmatch_precompile function in strmatch/apr_strmatch.c in Apache APR-util before 1.3.5 allows remote attackers to cause a denial of
    20Monitor
  • ← EarlierCVE-2009-1956Jun 7, 2009 · Off-by-one error in the apr_brigade_vprintf function in Apache APR-util before 1.3.5 on big-endian platforms allows remote attackers to obta
    29Monitor
  • Later →CVE-2011-1928May 24, 2011 · The fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library 1.4.3 and 1.4.4, and the Apache HTTP Server 2.2.18,
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:apache22.2.16-3 · Debian:12Package registry (OSV)
debian:apr-util1.3.9+dfsg-4 · Debian:12Package registry (OSV)
opensuse:apache22.4.23-4.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:apr-util1.5.4-4.4 · openSUSE:TumbleweedPackage registry (OSV)
red hat:ant0:1.7.1-13.jdk6.ep5.el4 · Red Hat:jboss_enterprise_web_server:1::el4Package registry (OSV)
red hat:antlr0:2.7.7-7.ep5.el4 · Red Hat:jboss_enterprise_web_server:1::el4Package registry (OSV)
red hat:apr-util0:0.9.4-22.el4_8.3 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:apr-util-debuginfo0:0.9.4-22.el4_8.3 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:apr-util-devel0:0.9.4-22.el4_8.3 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:apr-util-docs0:1.2.7-11.el5_5.2 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:apr-util-ldap0:1.3.9-3.el6_0.1 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:apr-util-mysql0:1.2.7-11.el5_5.2 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:apr-util-odbc0:1.3.9-3.el6_0.1 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:apr-util-pgsql0:1.3.9-3.el6_0.1 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:apr-util-sqlite0:1.3.9-3.el6_0.1 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:bcel0:5.2-8.1.ep5.el4 · Red Hat:jboss_enterprise_web_server:1::el4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

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

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records