HIGH
httpd: ap_find_token() buffer overread
Published Jun 20, 2017
7.5
HIGHCVSS 3.1
EPSS 57.47%
Description
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.
Affected products
-
- Version 2.2.32StatusaffectedConstraints-
- Version 2.4.24, 2.4.25StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | n/a |
|
Configuration 1
OR
- 2.2.32
- 2.4.24
- 2.4.25
Configuration 2
OR
- n/a
- n/a
- n/a
Configuration 3
OR
- 7.0
- 7.2
- 7.3
- 7.4
- 7.5
- 7.6
- 7.7
- 7.0
- 7.2
- 7.3
- 7.4
- 7.6
- 7.7
- 7.2
- 7.3
- 7.4
- 7.6
- 7.7
- 7.0
Configuration 4
OR
- 8.0
- 9.0
Configuration 5
- 5.3
Configuration 6
OR
- < 10.13.1
- ≥ 10.11.0 · < 10.11.6
- ≥ 10.12.0 · < 10.12.6
- 10.11.6
- 10.11.6
- 10.11.6
- 10.11.6
- 10.11.6
- 10.11.6
- 10.11.6
- 10.12.6
No data.
Red Hat Enterprise Linux 7
httpd-0:2.4.6-67.el7_4.2
Fixed · RHSA-2017:2479
Red Hat Enterprise Linux 7.2 Extended Update Support
httpd-0:2.4.6-40.el7_2.6
Fixed · RHSA-2017:3193
Red Hat Enterprise Linux 7.3 Extended Update Support
httpd-0:2.4.6-45.el7_3.5
Fixed · RHSA-2017:3194
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-httpd-0:2.4.25-9.el6.1
Fixed · RHSA-2017:2483
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
httpd24-httpd-0:2.4.25-9.el6.1
Fixed · RHSA-2017:2483
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-httpd-0:2.4.25-9.el7.1
Fixed · RHSA-2017:2483
Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS
httpd24-httpd-0:2.4.25-9.el7.1
Fixed · RHSA-2017:2483
Red Hat Enterprise Linux 5
httpd
Not affected
Red Hat Enterprise Linux 6
httpd
Not affected
Red Hat JBoss Core Services
httpd
Not affected
Red Hat JBoss Enterprise Application Platform 5
jbossas
Not affected
Red Hat JBoss Enterprise Application Platform 6
jbossas
Not affected
Red Hat JBoss Enterprise Web Server 1
httpd
Not affected
Red Hat JBoss Enterprise Web Server 2
httpd
Not affected
Red Hat JBoss Enterprise Web Server 3
httpd
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | httpd-0:2.4.6-67.el7_4.2 | Fixed | RHSA-2017:2479 |
| Red Hat Enterprise Linux 7.2 Extended Update Support | httpd-0:2.4.6-40.el7_2.6 | Fixed | RHSA-2017:3193 |
| Red Hat Enterprise Linux 7.3 Extended Update Support | httpd-0:2.4.6-45.el7_3.5 | Fixed | RHSA-2017:3194 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-httpd-0:2.4.25-9.el6.1 | Fixed | RHSA-2017:2483 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS | httpd24-httpd-0:2.4.25-9.el6.1 | Fixed | RHSA-2017:2483 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-httpd-0:2.4.25-9.el7.1 | Fixed | RHSA-2017:2483 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS | httpd24-httpd-0:2.4.25-9.el7.1 | Fixed | RHSA-2017:2483 |
| Red Hat Enterprise Linux 5 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 6 | httpd | Not affected | n/a |
| Red Hat JBoss Core Services | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | jbossas | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | jbossas | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 1 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 3 | httpd | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
6.5 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
57.47% 0.57472
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.57472
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (74 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 57.47% (0.57472) | 99.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 57.47% (0.57472) | 98.95th | v5 (v2026.06.15) |
| May 26, 2026 | 64.83% (0.64829) | 98.48th | v4 (v2025.03.14) |
| May 8, 2026 | 62.78% (0.62784) | 98.40th | v4 (v2025.03.14) |
| Apr 27, 2026 | 67.27% (0.67269) | 98.57th | v4 (v2025.03.14) |
| Apr 15, 2026 | 64.83% (0.64829) | 98.47th | v4 (v2025.03.14) |
| Mar 8, 2026 | 66.38% (0.66384) | 98.50th | v4 (v2025.03.14) |
| Mar 4, 2026 | 64.41% (0.64408) | 98.42th | v4 (v2025.03.14) |
| Mar 1, 2026 | 28.60% (0.28604) | 96.45th | v4 (v2025.03.14) |
| Feb 7, 2026 | 64.41% (0.64408) | 98.40th | v4 (v2025.03.14) |
| Feb 4, 2026 | 62.54% (0.62536) | 98.31th | v4 (v2025.03.14) |
| Feb 1, 2026 | 26.70% (0.26695) | 96.23th | v4 (v2025.03.14) |
| Jan 25, 2026 | 62.54% (0.62536) | 98.31th | v4 (v2025.03.14) |
| Jan 6, 2026 | 64.41% (0.64408) | 98.38th | v4 (v2025.03.14) |
| Jan 4, 2026 | 62.54% (0.62536) | 98.29th | v4 (v2025.03.14) |
| Jan 2, 2026 | 31.33% (0.31333) | 96.64th | v4 (v2025.03.14) |
| Jan 1, 2026 | 28.06% (0.28056) | 96.34th | v4 (v2025.03.14) |
| Dec 28, 2025 | 64.08% (0.64084) | 98.36th | v4 (v2025.03.14) |
| Dec 27, 2025 | 55.16% (0.55159) | 97.96th | v4 (v2025.03.14) |
| Dec 20, 2025 | 64.08% (0.64084) | 98.35th | v4 (v2025.03.14) |
| Dec 18, 2025 | 67.05% (0.67045) | 98.48th | v4 (v2025.03.14) |
| Dec 14, 2025 | 71.58% (0.71580) | 98.66th | v4 (v2025.03.14) |
| Dec 4, 2025 | 69.42% (0.69420) | 98.57th | v4 (v2025.03.14) |
| Dec 1, 2025 | 34.50% (0.34497) | 96.84th | v4 (v2025.03.14) |
| Nov 21, 2025 | 69.42% (0.69420) | 98.57th | v4 (v2025.03.14) |
| Nov 18, 2025 | 62.33% (0.62333) | 98.34th | v4 (v2025.03.14) |
| Nov 4, 2025 | 69.42% (0.69420) | 98.57th | v4 (v2025.03.14) |
| Nov 2, 2025 | 34.50% (0.34497) | 96.82th | v4 (v2025.03.14) |
| Nov 1, 2025 | 29.89% (0.29890) | 96.45th | v4 (v2025.03.14) |
| Oct 28, 2025 | 65.46% (0.65464) | 98.40th | v4 (v2025.03.14) |
| Oct 27, 2025 | 53.24% (0.53245) | 97.84th | v4 (v2025.03.14) |
| Oct 4, 2025 | 65.46% (0.65464) | 98.42th | v4 (v2025.03.14) |
| Oct 1, 2025 | 29.89% (0.29890) | 96.51th | v4 (v2025.03.14) |
| Sep 4, 2025 | 53.24% (0.53245) | 97.90th | v4 (v2025.03.14) |
| Sep 1, 2025 | 16.14% (0.16137) | 94.58th | v4 (v2025.03.14) |
| Aug 29, 2025 | 53.24% (0.53245) | 97.89th | v4 (v2025.03.14) |
| Aug 26, 2025 | 51.08% (0.51082) | 97.78th | v4 (v2025.03.14) |
| Aug 18, 2025 | 53.13% (0.53127) | 97.86th | v4 (v2025.03.14) |
| Aug 16, 2025 | 59.30% (0.59296) | 98.15th | v4 (v2025.03.14) |
| Aug 4, 2025 | 61.27% (0.61275) | 98.23th | v4 (v2025.03.14) |
| Aug 1, 2025 | 17.44% (0.17437) | 94.84th | v4 (v2025.03.14) |
| Jul 30, 2025 | 61.27% (0.61275) | 98.23th | v4 (v2025.03.14) |
| Jul 4, 2025 | 71.89% (0.71890) | 98.66th | v4 (v2025.03.14) |
| Jul 1, 2025 | 31.80% (0.31795) | 96.61th | v4 (v2025.03.14) |
| Jun 8, 2025 | 71.89% (0.71890) | 98.64th | v4 (v2025.03.14) |
| Jun 4, 2025 | 70.44% (0.70444) | 98.58th | v4 (v2025.03.14) |
| Jun 1, 2025 | 29.89% (0.29894) | 96.40th | v4 (v2025.03.14) |
| May 30, 2025 | 70.44% (0.70444) | 98.58th | v4 (v2025.03.14) |
| May 4, 2025 | 71.89% (0.71890) | 98.64th | v4 (v2025.03.14) |
| May 1, 2025 | 31.80% (0.31795) | 96.54th | v4 (v2025.03.14) |
| Apr 28, 2025 | 71.89% (0.71890) | 98.63th | v4 (v2025.03.14) |
| Mar 30, 2025 | 70.44% (0.70444) | 98.58th | v4 (v2025.03.14) |
| Mar 29, 2025 | 74.55% (0.74554) | 98.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 70.44% (0.70444) | 98.58th | v4 (v2025.03.14) |
| Dec 17, 2024 | 46.55% (0.46549) | 97.52th | v3 (v2023.03.01) |
| Feb 8, 2024 | 27.31% (0.27310) | 96.61th | v3 (v2023.03.01) |
| Dec 14, 2023 | 31.04% (0.31037) | 96.52th | v3 (v2023.03.01) |
| Nov 8, 2023 | 35.24% (0.35243) | 96.70th | v3 (v2023.03.01) |
| Sep 23, 2023 | 96.71% (0.96714) | 99.52th | v3 (v2023.03.01) |
| Jul 5, 2023 | 96.88% (0.96884) | 99.54th | v3 (v2023.03.01) |
| May 30, 2023 | 96.80% (0.96797) | 99.48th | v3 (v2023.03.01) |
| May 8, 2023 | 96.92% (0.96924) | 99.53th | v3 (v2023.03.01) |
| Apr 29, 2023 | 97.29% (0.97289) | 99.75th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.32% (0.97317) | 99.75th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.77% (0.07767) | 93.09th | v2 (v2022.01.01) |
| Apr 22, 2022 | 7.77% (0.07767) | 92.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.24% (0.05242) | 88.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.24% (0.05242) | 75.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 19.19% (0.19186) | 94.08th | v1 |
| Jan 6, 2022 | 19.19% (0.19186) | 94.01th | v1 |
| Sep 1, 2021 | 19.19% (0.19186) | 97.84th | v1 |
| Jun 8, 2021 | 19.19% (0.19186) | 0.00th | v1 |
| Jun 3, 2021 | 17.90% (0.17900) | 0.00th | v1 |
| Apr 14, 2021 | 17.46% (0.17462) | 0.00th | v1 |
Weaknesses (3)
References (41)
- http://www.debian.org/security/2017/dsa-3896 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html x_refsource_CONFIRMPatchThird Party Advisory
- http://www.securityfocus.com/bid/99137 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038711 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2479 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2483 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3193 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3194 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-7668 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1463205 Issue Tracking
- https://httpd.apache.org/security/vulnerabilities_22.html
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5af3745b%40%3Cdev.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2017-7668
- https://security.gentoo.org/glsa/201710-32 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.netapp.com/advisory/ntap-20180601-0002/ x_refsource_CONFIRMThird Party Advisory
- https://support.apple.com/HT208221 x_refsource_CONFIRMThird Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03821en_us x_refsource_CONFIRMThird Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-7668
- https://www.tenable.com/security/tns-2019-09 x_refsource_CONFIRMThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Jun 20, 2017
Updated Aug 5, 2024
Reserved Apr 11, 2017
Link CVE-2017-7668
CISA Vulnrichment
Updated n/a