HOMEVULNERABILITIESCVE-2018-15504
HIGH

CVE-2018-15504

CWE-476Published: August 18, 2018· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. The server mishandles some HTTP request fields associated with time, which results in a NULL pointer dereference, as demonstrated by If-Modified-Since or If-Unmodified-Since with a month greater than 11.

NVD Source

Technical Analysis

CVE-2018-15504 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

embedthis2 product(s)
appwebgoahead
Juniper Networks132 product(s)
junossrx100srx110srx1400srx1500srx210srx220srx240srx240h2srx240msrx300srx320+120
Source: NVD CPE · 149 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daef
PATCHhttps://github.com/embedthis/appweb/issues/605
PATCHhttps://github.com/embedthis/goahead/issues/264
PATCHhttps://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daef
PATCHhttps://github.com/embedthis/appweb/issues/605
PATCHhttps://github.com/embedthis/goahead/issues/264
ADVISORYhttps://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-Server
ADVISORYhttps://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved
ADVISORYhttps://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-Server
ADVISORYhttps://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved

All References (10)

→
https://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daefPatch · Third Party Advisory
→
https://github.com/embedthis/appweb/issues/605Exploit · Patch · Third Party Advisory
→
https://github.com/embedthis/goahead/issues/264Exploit · Patch · Third Party Advisory
→
https://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-ServerThird Party Advisory
→
https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolvedThird Party Advisory
→
https://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daefPatch · Third Party Advisory
→
https://github.com/embedthis/appweb/issues/605Exploit · Patch · Third Party Advisory
→
https://github.com/embedthis/goahead/issues/264Exploit · Patch · Third Party Advisory
→
https://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-ServerThird Party Advisory
→
https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolvedThird Party Advisory

Quick Facts

CVE IDCVE-2018-15504
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-476
CISA KEVNo
Affected2 vendor(s)
PublishedAug 18, 2018

Related CVEs (CWE-476)

CVE-2010-2495
10.0
CVE-2022-36648
10.0
CVE-2014-8241
9.8
CVE-2022-0582
9.8
CVE-2015-0573
9.8
CVE-2016-5690
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-15504 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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