CVE-2023-37788Public exploitNetwork attack vector

Unauthenticated proxy crash via nil request dereference

Published Jul 18, 2023 · Updated Oct 28, 2024

Denial of service in elazarl goproxy 1.1 allows remote attackers to crash a MITM-mode proxy with a malformed HTTPS request. In handleHttps, a request-target of * causes request parsing to return nil, but the logging path dereferences that nil request and panics. The proxy must be operating in MITM mode and accept the crafted request; triggering the panic terminates the goproxy server.

CVSS severity7.5
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in elazarl goproxy 1.1 allows remote attackers to crash a MITM-mode proxy with a malformed HTTPS request. In handleHttps, a request-target of * causes request parsing to return nil, but the logging path dereferences that nil request and panics. The proxy must be operating in MITM mode and accept the crafted request; triggering the panic terminates the goproxy server.

The record

CVE
CVE-2023-37788
Published
Jul 18, 2023
Updated
Oct 28, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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