CVE-2011-3192

HIGHCVSS v2 · 7.87.8
EchelonGraph scoreLOW confidence

“—” beside the score: it is equal to NVD's CVSS v2 base score.

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.8 — NVD rates that HIGH (NVD's v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; no CRITICAL band). Vector AV:N/AC:L/Au:N/C:N/I:N/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 99% exploitation probability in the next 30 days; it does not lift the v2 base. EPSS sets EG Risk's exploitation input. Confidence: LOW.

Triggered by: NVD CVSS v2.0 (legacy fallback)
Sources: NVD CVSS v2.0
Trending — 4 sources updated this weekWeaponized

Also known asEUVD-2011-3156 (ENISA EUVD) · GHSA-r3pv-69hm-fcjw (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • 19 internet-facing services (distinct ip:port) on record running an affected version — derived from Shodan data (© Shodan); a patched service can stay counted while its port stays open
  • High exploitation likelihood — EPSS 99%
  • Public exploit code is available (Metasploit, other public proof-of-concept code)
CISA-KEV: Not listedEPSS PROB: 99%CVSS v2: 7.8Exploit: Metasploit · other public PoCExposed services: 19

A fix is available — apply it.

The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header that expresses multiple overlapping ranges, as exploited in the wild in August 2011, a different vulnerability than CVE-2007-0086.

Internet exposure · derived from Shodan data

19 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2011-3192, in our KEV-Exposure radar’s Shodan-derived sample.

across 9 countries (United States, Japan, Czechia, Australia, Canada)top: http_server
See the KEV-Exposure radar →Derived from Shodan data. Shodan data is owned by Shodan, which holds its copyright (© Shodan). EchelonGraph claims no ownership of it or copyright in it. Aggregate, host-redacted.

How it counts: every 12 hours, when Shodan query credits allow, the radar runs one Shodan query per tracked product, reads up to 100 ip:port services per query, and keeps a service when its banner version matches a CISA-KEV or high-EPSS CVE; a service is dropped when neither a search nor a Shodan InternetDB port re-check has refreshed it for 21 days. A re-check that finds the port still listed by Shodan InternetDB refreshes the service without re-reading the banner, so a patched service can stay counted while its port stays open. A count is a banner-version inference over a sample, not an exploit test and not an internet-wide census, and the unit is a service, not a machine: a machine answering on two ports counts twice.

CVSS v2.0 (legacy)
7.8HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.8HIGHlow confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation99% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
99%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v2.0 · CVSS v2.0AV:N/AC:L/Au:N/C:N/I:N/A:C
EG Likelihood
99% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 29, 2011

Last Modified

April 29, 2026

References (72)

15 of 72 shown · show the other 57

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuapache2.2-bin (2.2.17-1ubuntu1.2) @ natty2026-10-29ubuntu
redhathttpd-0:2.2.17-13.2.ep5.el62011-09-21redhat
redhatpatch2011-09-21redhat
redhathttpd-0:2.0.46-78.ent2011-09-15redhat
redhathttpd-0:2.2.15-5.el6_0.12011-09-14redhat
redhathttpd-0:2.2.15-9.el6_1.22011-08-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.2.19-2: fixed in 2.2.19-2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.2.19-2: fixed in 2.2.19-2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.2.19-2: fixed in 2.2.19-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.2.19-2: fixed in 2.2.19-2
—
Debian:5.0(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.2.9-10+lenny2 ... 2.2.9-10+lenny9 (8 versions)
  • every version up to 2.2.9-10+lenny10: fixed in 2.2.9-10+lenny10
—
Debian:6.0(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.2.16-6, 2.2.16-6+squeeze1, 2.2.16-6+squeeze1~bpo50+1, 2.2.16-6+squeeze2~bpo50+1
  • every version up to 2.2.16-6+squeeze2: fixed in 2.2.16-6+squeeze2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 4× in last 7d / 15× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 12 repeat rows among the latest 64 are merged into the row they repeat.

  1. 2026-10-31 16:26 UTCEPSS rescoreEPSS 99% · 99th percentile
  2. 2026-10-29 18:28 UTCEG score recompute
  3. 2026-10-29 18:28 UTCVendor advisory
  4. 2026-10-29 18:28 UTCGHSA enrichmentGHSA-r3pv-69hm-fcjw · GitHub severity HIGH
  5. 2026-10-25 20:15 UTCEG score recompute
  6. 2026-10-25 16:26 UTCEPSS rescoreEPSS 99% · 99th percentile
  7. 2026-10-24 21:25 UTCOSV refresh
  8. 2026-10-22 16:26 UTCEPSS rescoreEPSS 99% · 99th percentile
  9. 2026-10-18 16:25 UTCEPSS rescoreEPSS 99% · 99th percentile
  10. 2026-10-18 11:31 UTCEG score recompute
  11. 2026-10-13 16:26 UTCEPSS rescoreEPSS 99% · 99th percentile
  12. 2026-10-12 21:35 UTCEG score recompute
  13. 2026-10-12 01:42 UTCEG score recompute
  14. 2026-10-10 19:54 UTCEPSS rescoreEPSS 99% · 99th percentile
  15. 2026-10-07 23:38 UTCEPSS rescoreEPSS 99% · 99th percentile
  16. 2026-10-01 02:40 UTCOSV refresh
  17. 2026-09-29 08:21 UTCEG score recompute
  18. 2026-09-24 13:57 UTCEPSS rescoreEPSS 99% · 99th percentile
  19. 2026-09-12 05:53 UTCOSV refresh
  20. 2026-09-06 13:41 UTCEPSS rescoreEPSS 99% · 99th percentile
  21. 2026-09-05 15:22 UTCEPSS rescoreEPSS 99% · 99th percentile
  22. 2026-08-24 11:42 UTCOSV refresh
  23. 2026-08-08 16:31 UTCEPSS rescoreEPSS 99% · 99th percentile
  24. 2026-08-08 07:49 UTCOSV refresh
  25. 2026-07-26 13:43 UTCEG score recomputeAssessed again: 7.8 HIGH
Show 27 more
  1. 2026-07-23 01:06 UTCVendor advisory
  2. 2026-07-23 01:06 UTCGHSA enrichmentGHSA-r3pv-69hm-fcjw · GitHub severity HIGH
  3. 2026-07-23 01:05 UTCEG score recompute▼ 9.00
  4. 2026-07-23 00:15 UTCOSV refresh
  5. 2026-07-23 00:09 UTCEG score recompute
  6. 2026-07-22 21:47 UTCEG score recompute
  7. 2026-07-22 14:03 UTCEPSS rescoreEPSS 99% · 99th percentile
  8. 2026-07-11 08:22 UTCEPSS rescoreEPSS 99% · 99th percentile
  9. 2026-07-05 18:59 UTCOSV refresh
  10. 2026-06-28 04:52 UTCEPSS rescoreEPSS 99% · 99th percentile
  11. 2026-06-17 06:13 UTCOSV refresh
  12. 2026-06-15 17:44 UTCEPSS rescoreEPSS 99% · 99th percentile
  13. 2026-06-13 22:57 UTCEPSS rescoreEPSS 90% · 99th percentile
  14. 2026-06-12 23:08 UTCEPSS rescoreEPSS 90% · 99th percentile
  15. 2026-06-10 22:14 UTCEPSS rescoreEPSS 90% · 99th percentile
  16. 2026-06-08 14:14 UTCEPSS rescoreEPSS 90% · 99th percentile
  17. 2026-06-05 22:44 UTCEPSS rescoreEPSS 90% · 99th percentile
  18. 2026-06-05 06:07 UTCEPSS rescoreEPSS 91% · 99th percentile
  19. 2026-06-04 13:09 UTCEPSS rescoreEPSS 91% · 99th percentile
  20. 2026-05-29 07:09 UTCEG score recompute
  21. 2026-05-29 07:09 UTCVendor advisory
  22. 2026-05-29 07:09 UTCGHSA enrichmentGHSA-r3pv-69hm-fcjw · GitHub severity HIGH
  23. 2026-05-28 13:42 UTCEPSS rescoreEPSS 91% · 99th percentile
  24. 2026-05-27 13:38 UTCEPSS rescoreEPSS 91% · 99th percentile
  25. 2026-05-22 21:15 UTCEPSS rescoreEPSS 90% · 99th percentile
  26. 2026-05-22 16:13 UTCOSV refresh
  27. 2026-05-18 21:29 UTCEPSS rescoreEPSS 90% · 99th percentile

Publicly available exploits

(5 references)

Public exploit code is referenced for this CVE (1 Metasploit module, 2 Exploit-DB entries, 2 GitHub PoCs). Defenders should treat patch urgency accordingly.

  • Metasploitauxiliary/dos/http/apache_range_dos✓ verified
    Published Sep 23, 2011

    Apache Range Header DoS (Apache Killer)

    Open source ↗
  • GitHub PoCbluedragonsecurity/CVE-2011-3192-apache-exploit
    Published May 14, 2026

    CVE-2011-3192 - Remote Apache DOS for Apache versions 1.3.x, 2.0.64 and below and 2.2.19 and below. Developed in 2011 by Antonius (ev1lut10n / w1sdom)

    Open source ↗
  • Exploit-DBEDB-18221
    Published Dec 9, 2011

    Apache - Denial of Service

    Open source ↗
  • GitHub PoCtkisason/KillApachePy
    Published Oct 26, 2011

    Python Apache Killer (Range Header DoS CVE-2011-3192)

    Open source ↗
  • Exploit-DBEDB-17696
    Published Aug 19, 2011

    Apache - Remote Memory Exhaustion (Denial of Service)

    Open source ↗

Frequently asked(4)

What is CVE-2011-3192?
CVE-2011-3192 is a high-severity vulnerability; its CVE record was published on August 29, 2011. The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header that expresses multiple overlapping ranges, as exploited in the wild in August 2011, a different…
When was CVE-2011-3192 made public?
CVE-2011-3192 was made public on August 20, 2011: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 29, 2011. EchelonGraph's copy of the record carries a last-modified date of April 29, 2026; the record at its source may have been updated since.
Is CVE-2011-3192 actively exploited?
CVE-2011-3192 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: a Metasploit module exists for it. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 99% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
How do I remediate CVE-2011-3192?
A fix for CVE-2011-3192 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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