The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.
CVE-2017-7668
HIGHNVD 7.58.2▲Elevated
EchelonGraph scoreHIGH confidence
Score elevated to 8.2 because EPSS predicts 57% probability of exploitation within the next 30 days (99th percentile of EPSS-scored CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.
Triggered by: EPSS exploit prediction (continuous uplift above 30%)
Sources: epss, ghsa, nvd
8.2EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
- 44 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 57%
CISA-KEV: Not listedEPSS PROB: 57%CVSS: 7.5Exploit: Elevated riskExposed services: 44
A fix is available — apply it.
Internet exposure · derived from Shodan data
44 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2017-7668, in our KEV-Exposure radar’s Shodan-derived sample.
across 18 countries (United States, Germany, France, Brazil, Japan)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 v3
- 7.5
- EG Score
- 8.2HIGHhigh confidence
- EG Risk
- 64EG Risk 64/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity82% × 45%Exploitation57% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).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
- 57%
- EPSS %ILE
- 99th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).
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 (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
June 20, 2017
Last Modified
June 17, 2026
References (70)
- security@apachehttp://www.debian.org/security/2017/dsa-3896
- security@apachehttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- security@apachehttp://www.securityfocus.com/bid/99137
- security@apachehttp://www.securitytracker.com/id/1038711
- security@apachehttps://access.redhat.com/errata/RHSA-2017:2479
- security@apachehttps://access.redhat.com/errata/RHSA-2017:2483
- security@apachehttps://access.redhat.com/errata/RHSA-2017:3193
- security@apachehttps://access.redhat.com/errata/RHSA-2017:3194
- security@apachehttps://lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5af3745b%40%3Cdev.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E
- security@apachehttps://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E
Patch Availability(6)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | apache2-bin (2.4.25-3ubuntu2.1) @ zesty | 2026-05-22 | ubuntu |
| ubuntu | apache2.2-bin (2.2.22-1ubuntu1.12) @ precise | 2026-05-22 | ubuntu |
| redhat | httpd-0:2.4.6-40.el7_2.6 | 2017-11-13 | redhat |
| redhat | httpd-0:2.4.6-45.el7_3.5 | 2017-11-13 | redhat |
| redhat | httpd24-httpd-0:2.4.25-9.el7.1 | 2017-08-16 | redhat |
| redhat | httpd-0:2.4.6-67.el7_4.2 | 2017-08-15 | redhat |
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
(29 across 29 ecosystems)
Alpine:v3.10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.15(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.16(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.17(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.18(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.19(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.20(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.3(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.4(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.5(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.6(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.7(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Alpine:v3.9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | — |
| — |
Debian:7(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | 2.2.22-13 ... 2.2.22-13+deb7u8 (9 versions) |
| — |
Debian:8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | 2.4.10-10 ... 2.4.10-10+deb8u8 (9 versions) |
| — |
Debian:9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| apache2 | 2.4.25-3 |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(6)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2017:2479MODERATE2017-06-20
RHSA-2017:2479 — Moderate
- Red HatRHSA-2017:2483MODERATE2017-06-20
RHSA-2017:2483 — Moderate
- Red HatRHSA-2017:3193MODERATE2017-06-20
RHSA-2017:3193 — Moderate
- Red HatRHSA-2017:3194MODERATE2017-06-20
RHSA-2017:3194 — Moderate
- UbuntuUSN-3340-1MEDIUM
Apache HTTP Server vulnerabilities
- UbuntuUSN-3373-1MEDIUM
Apache HTTP Server vulnerabilities
Data Freshness Timeline
(refreshed 6× in last 7d / 21× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.
Showing the most recent 100 of 144 total refreshes for this CVE.
- 2026-10-09 20:02 UTCEPSS rescore
- 2026-10-08 04:05 UTCOSV refresh
- 2026-10-07 23:41 UTCEPSS rescore
- 2026-10-06 15:12 UTCEPSS rescore
- 2026-10-03 14:21 UTCEPSS rescore
- 2026-10-03 14:21 UTCEPSS rescore
- 2026-09-30 14:59 UTCEPSS rescore
- 2026-09-30 09:40 UTCEG score recompute
- 2026-09-28 13:45 UTCEPSS rescore
- 2026-09-27 13:40 UTCEPSS rescore
- 2026-09-27 13:40 UTCEPSS rescore
- 2026-09-26 15:53 UTCEPSS rescore
- 2026-09-24 13:59 UTCEPSS rescore
- 2026-09-23 13:42 UTCEPSS rescore
- 2026-09-21 20:27 UTCEPSS rescore
- 2026-09-19 15:36 UTCEPSS rescore
- 2026-09-18 10:20 UTCOSV refresh
- 2026-09-17 19:22 UTCEPSS rescore
- 2026-09-17 19:22 UTCEPSS rescore
- 2026-09-15 03:05 UTCEPSS rescore
- 2026-09-12 14:56 UTCEPSS rescore
- 2026-09-05 15:24 UTCEPSS rescore
- 2026-09-04 13:56 UTCEPSS rescore
- 2026-09-04 05:02 UTCEPSS rescore
- 2026-09-02 14:07 UTCEPSS rescore
Show 75 moreShow fewer
- 2026-09-02 14:07 UTCEPSS rescore
- 2026-09-01 03:31 UTCEPSS rescore
- 2026-08-30 19:13 UTCEPSS rescore
- 2026-08-30 11:00 UTCOSV refresh
- 2026-08-28 21:36 UTCEPSS rescore
- 2026-08-27 14:21 UTCEPSS rescore
- 2026-08-26 14:41 UTCEPSS rescore
- 2026-08-25 13:44 UTCEPSS rescore
- 2026-08-23 00:14 UTCEPSS rescore
- 2026-08-21 23:44 UTCEPSS rescore
- 2026-08-19 16:59 UTCEPSS rescore
- 2026-08-16 14:51 UTCEPSS rescore
- 2026-08-16 02:10 UTCEPSS rescore
- 2026-08-15 01:26 UTCEPSS rescore
- 2026-08-14 00:47 UTCOSV refresh
- 2026-08-12 13:46 UTCEPSS rescore
- 2026-08-09 13:42 UTCEPSS rescore
- 2026-08-07 16:22 UTCEPSS rescore
- 2026-08-05 19:13 UTCEPSS rescore
- 2026-08-01 04:12 UTCEPSS rescore
- 2026-07-30 01:26 UTCEPSS rescore
- 2026-07-29 05:33 UTCOSV refresh
- 2026-07-28 15:32 UTCEPSS rescore
- 2026-07-26 14:51 UTCEPSS rescore
- 2026-07-26 14:51 UTCEPSS rescore
- 2026-07-23 14:15 UTCEPSS rescore
- 2026-07-23 01:30 UTCEG score recompute▲ 0.70
- 2026-07-22 22:10 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescore
- 2026-07-21 15:21 UTCEPSS rescore
- 2026-07-20 17:04 UTCEPSS rescore
- 2026-07-20 17:04 UTCEPSS rescore
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-18 10:01 UTCEPSS rescore
- 2026-07-15 16:55 UTCEPSS rescore
- 2026-07-15 16:54 UTCEPSS rescore
- 2026-07-13 22:26 UTCEPSS rescore
- 2026-07-13 22:26 UTCEPSS rescore
- 2026-07-12 05:43 UTCEPSS rescore
- 2026-07-11 21:52 UTCOSV refresh
- 2026-07-11 08:24 UTCEPSS rescore
- 2026-07-09 19:06 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-05 02:27 UTCEPSS rescore
- 2026-07-02 16:54 UTCEPSS rescore
- 2026-07-01 15:03 UTCEPSS rescore
- 2026-06-30 23:19 UTCEPSS rescore
- 2026-06-30 23:19 UTCEPSS rescore
- 2026-06-28 04:53 UTCEPSS rescore
- 2026-06-28 04:53 UTCEPSS rescore
- 2026-06-27 03:06 UTCEPSS rescore
- 2026-06-25 13:47 UTCEPSS rescore
- 2026-06-23 21:30 UTCEPSS rescore
- 2026-06-23 21:30 UTCEPSS rescore
- 2026-06-23 04:30 UTCOSV refresh
- 2026-06-21 14:54 UTCEPSS rescore
- 2026-06-21 14:54 UTCEPSS rescore
- 2026-06-21 01:57 UTCEPSS rescore
- 2026-06-21 01:57 UTCEPSS rescore
- 2026-06-19 19:23 UTCEPSS rescore
- 2026-06-19 19:23 UTCEPSS rescore
- 2026-06-18 17:50 UTCEPSS rescore
- 2026-06-17 17:50 UTCEPSS rescore
- 2026-06-16 17:50 UTCEPSS rescore
- 2026-06-15 17:45 UTCEPSS rescore
- 2026-06-12 23:09 UTCEPSS rescore
- 2026-06-12 23:09 UTCEPSS rescore
- 2026-06-11 13:57 UTCEPSS rescore
- 2026-06-10 22:15 UTCEPSS rescore
- 2026-06-10 13:19 UTCEPSS rescore
- 2026-06-08 14:14 UTCEPSS rescore
- 2026-06-08 14:14 UTCEPSS rescore
- 2026-06-07 15:22 UTCEPSS rescore
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.3:apache2 · Alpine:v3.4:apache2
- CVE-2017-7679EG 9.8EPSS p99CRITICAL
- CVE-2017-3169EG 9.8EPSS p97CRITICAL
- CVE-2017-3167EG 9.8EPSS p97CRITICAL
- CVE-2017-9798NVD 7.5EG 9.0EPSS p100CRITICAL
- CVE-2018-1312EG 9.8EPSS p97CRITICAL
- CVE-2017-15710EG 7.5EPSS p97HIGH
- CVE-2018-1301EG 5.9EPSS p97MEDIUM
- CVE-2017-15715NVD 8.1EG 9.0EPSS p100CRITICAL
- CVE-2018-1303NVD 7.5EG 8.6EPSS p99HIGH
- CVE-2018-1283EG 5.3EPSS p95MEDIUM
Same vendor
7 shownredhat:RHSA-2017:2479 · redhat:RHSA-2017:3193 · redhat:RHSA-2017:2483
Frequently asked(5)
What is CVE-2017-7668?
CVE-2017-7668 is a high vulnerability published on June 20, 2017. The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows apfindtoken() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to…
When was CVE-2017-7668 disclosed?
CVE-2017-7668 was first published on June 20, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-7668 actively exploited?
CVE-2017-7668 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-7668?
CVE-2017-7668 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.2 (HIGH).
How do I remediate CVE-2017-7668?
A fix for CVE-2017-7668 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-7668
Is Your Infrastructure Affected by CVE-2017-7668?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.