CVE-2020-13577Network attack vector

Service crash via null namespace value

Published Feb 10, 2021 · Updated Aug 4, 2024

NULL pointer dereference in Genivia gSOAP 2.8.107 allows remote attackers to crash WS-Security services via a crafted SOAP request. While processing RequestSecurityToken XML, soap_attribute passes a repeated namespace with no value to soap_push_ns, which dereferences the null value. An unauthenticated HTTP client can reach the path only in a service built with the WS-Security plugin and terminate that service process.

CVSS severity7.5
High
EPSS probability3.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Genivia gSOAP 2.8.107 allows remote attackers to crash WS-Security services via a crafted SOAP request. While processing RequestSecurityToken XML, soap_attribute passes a repeated namespace with no value to soap_push_ns, which dereferences the null value. An unauthenticated HTTP client can reach the path only in a service built with the WS-Security plugin and terminate that service process.

The record

CVE
CVE-2020-13577
Published
Feb 10, 2021
Updated
Aug 4, 2024
Vendor
Genivia
Product
gSOAP
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Genivia gSOAP 2.8.107

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Genivia · gSOAPversion=Genivia gSOAP 2.8.107

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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