CVE-2017-3169: apache software foundation apache http server NULL Pointer Dereference
Vulnerability summary
CVE-2017-3169 is a critical (CVSS 9.8) NULL Pointer Dereference vulnerability in apache software foundation apache http server. EPSS estimates a 19.95% chance of exploitation in the next 30 days, higher than 97.4% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 20% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 16 · Related 5Timeline
- 20-06-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
19.95%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
No change 0.00 pp
From 19.95% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- apache2< 2.4.26-r0
Apache1 product
- http_serverEOL2.2.0 | 2.2.2 | 2.2.3 | 2.2.11 | 2.2.12 | 2.2.13 | 2.2.14 | 2.2.15 | 2.2.16 | 2.2.17 | 2.2.18 | 2.2.19 | 2.2.20 | 2.2.21 | 2.2.22 | 2.2.23 | 2.2.24 | 2.2.25 | 2.2.26 | 2.2.27 | 2.2.29 | 2.2.30 | 2.2.31 | 2.2.32 | 2.4.1 | 2.4.2 | 2.4.10 | 2.4.12 | 2.4.16 | 2.4.17 | 2.4.18 | 2.4.20 | 2.4.23 | 2.4.25
Apache software foundation1 product
- apache http server2.2.0 to 2.2.32 | 2.4.0 to 2.4.25
Debian1 product
- apache2< 2.4.25-4
Ubuntu1 product
- apache2< 2.4.7-1ubuntu4.16 | < 2.4.18-2ubuntu3.3
5 vendors · 5 products
References
49 links- support.apple.com/HT208221X Refsource CONFIRM
- security.netapp.com/advisory/ntap-20180601-0002/X Refsource CONFIRM
- www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlX Refsource CONFIRM
Show all 49 references
- github.com/gottburgm/Exploits/tree/master/CVE-2017-3169X Refsource MISC
- www.tenable.com/security/tns-2019-09X Refsource CONFIRM