EmbedThis GoAhead/Appweb HTTP POST Request Host null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in EmbedThis GoAhead and Appweb. The impacted element is an unknown function of the component HTTP POST Request Handler. Such manipulation of the argument Host leads to null pointer dereference. This vulnerability is referenced as CVE-2018-15505. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in EmbedThis GoAhead and Appweb. It has been rated as problematic. Affected by this issue is some unknown functionality of the component HTTP POST Request Handler. The manipulation of the argument Host with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

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.

The bug was discovered 02/05/2018. The weakness was published 08/18/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-15505 since 08/17/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 193 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability.

Similar entry is available at VDB-123019. Once again VulDB remains the best source for vulnerability data.

Affected

  • EmbedThis GoAhead up to 4.0.0
  • EmbedThis Appweb up to 7.0.1

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

02/05/2018 🔍
08/17/2018 +192 days 🔍
08/17/2018 +0 days 🔍
08/18/2018 +1 days 🔍
08/18/2018 +0 days 🔍
05/02/2023 +1718 days 🔍

Sourcesinfo

Advisory: 16e6979c82297d5fc4f8661e7ada975f51e4dfa9
Status: Not defined

CVE: CVE-2018-15505 (🔍)
GCVE (CVE): GCVE-0-2018-15505
GCVE (VulDB): GCVE-100-123020
See also: 🔍

Entryinfo

Created: 08/18/2018 13:35
Updated: 05/02/2023 14:30
Changes: 08/18/2018 13:35 (59), 03/16/2020 15:32 (1), 05/02/2023 14:30 (5)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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