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CVE-2017-9788

60
FAUCET Score

CVE-2017-9788 is a critical vulnerability in Apache httpd versions prior to 2.2.34 and 2.4.27, affecting products from vendors like Apple, Debian, and Oracle. It stems from improper initialization of Digest authentication headers, allowing for information leakage of confidential data or denial of service through a segfault. With a CVSS score of 9.1 (CRITICAL), it is easily exploitable over the network with low attack complexity, leading to high confidentiality impact and high availability impact. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.33CPE matchmatch criteria
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
>= 2.4.0, <= 2.4.26CPE matchmatch criteria
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
< 10.13.1CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
56.77%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.5677 is in the 97th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (36)

apachepatch availablevia llm_extracted
Fixed in: 2.4
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-httpd-0:2.4.23-122.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: httpd-0:2.2.15-60.el6_9.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.7 Extended Update SupportFixed in: httpd-0:2.2.15-47.el6_7.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: httpd-0:2.4.6-67.el7_4.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.2 Extended Update SupportFixed in: httpd-0:2.4.6-40.el7_2.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.3 Extended Update SupportFixed in: httpd-0:2.4.6-45.el7_3.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4Fixed in: httpd
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6Fixed in: httpd-0:2.2.26-57.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6Fixed in: mod_cluster-native-0:1.2.13-9.Final_redhat_2.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7Fixed in: httpd22-0:2.2.26-58.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7Fixed in: mod_cluster-native-0:1.2.13-9.Final_redhat_2.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: mod_cluster-native-0:1.2.13-9.Final_redhat_2.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: tomcat6-0:6.0.41-19_patch_04.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: tomcat7-0:7.0.54-28_patch_05.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 7Fixed in: httpd22-0:2.2.26-58.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 7Fixed in: jbcs-httpd24-openssl-1:1.0.2h-14.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 7Fixed in: mod_cluster-native-0:1.2.13-9.Final_redhat_2.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 7Fixed in: tomcat6-0:6.0.41-19_patch_04.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 7Fixed in: tomcat7-0:7.0.54-28_patch_05.ep6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-httpd-0:2.4.25-9.el6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: httpd24-httpd-0:2.4.25-9.el6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-httpd-0:2.4.25-9.el7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: httpd24-httpd-0:2.4.25-9.el7.1
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: httpd
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2 for RHEL 6Fixed in: httpd-0:2.2.26-57.ep6.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-httpd-0:2.4.23-122.jbcs.el6
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: httpd

Vendor Advisories (4)

apachellm-apache-f398f8ed28802aa3LOW

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

Mar 2, 2026
apachellm-apache-a7a91ec4c0e9421dHIGH

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

Dec 10, 2025
redhatCVE-2017-9788Important

httpd: Uninitialized memory reflection in mod_auth_digest

Jul 11, 2017
apachellm-apache-684e4d0003611bd4LOW

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

References

access.redhat.com / errata/RHSA-2017:2478
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2479
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2483
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2708
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2709
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2710
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3113
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3114
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3193
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3194
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3195
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3239
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3240
Third Party Advisory
httpd.apache.org / security/vulnerabilities_22.html
Vendor Advisory
httpd.apache.org / security/vulnerabilities_24.html
Vendor Advisory
lists.apache.org / thread.html/0dd69204a6bd643cc4e9ccd008f07a9375525d977c6ebeb07a881afb%40%3Cannounce.httpd.apache.org%3E
lists.apache.org / thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r8c9983f1172a3415f915ddb7e14de632d2d0c326eb1285755a024165%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rfcf929bd33a6833e3f0c35eebdad70d5060665f9c4e17ea467c66770%40%3Ccvs.httpd.apache.org%3E
security.gentoo.org / glsa/201710-32
Third Party Advisory
security.netapp.com / advisory/ntap-20170911-0002
Third Party Advisory
support.apple.com / HT208221
Third Party Advisory
support.hpe.com / hpsc/doc/public/display
Third Party Advisory
tenable.com / security/tns-2019-09
debian.org / security/2017/dsa-3913
Third Party Advisory
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
PatchThird Party Advisory
securityfocus.com / bid/99569
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038906
Third Party AdvisoryVDB Entry