What’s Vulnerable › Vulnerabilities

CVE-2018-15505

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-08-18 · updated 2026-06-17
• Weakness: CWE-476

Description

An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. An HTTP POST request with a specially crafted "Host" header field may cause a NULL pointer dereference and thus cause a denial of service, as demonstrated by the lack of a trailing ']' character in an IPv6 address.

Affected products

• EmbedThis Appweb: before 7.0.2 — fixed in 7.0.2
• EmbedThis GoAhead: before 4.0.1 — fixed in 4.0.1
• Juniper Junos OS: 12.3, 12.3-r1, 12.3-r10, 12.3-r10-s1, 12.3-r10-s2, 12.3-r11 (+215)

How to fix

Upgrade to a fixed version: EmbedThis Appweb 7.0.2; EmbedThis GoAhead 4.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/embedthis/appweb/commit/16e6979c82297d5fc4f8661e7ada975f51e4dfa9
• https://github.com/embedthis/appweb/issues/605
• https://github.com/embedthis/goahead/issues/264
• https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved?language=en_US
• https://github.com/embedthis/appweb/commit/16e6979c82297d5fc4f8661e7ada975f51e4dfa9
• https://github.com/embedthis/appweb/issues/605
• https://github.com/embedthis/goahead/issues/264
• https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved?language=en_US

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