CVE-2023-33457Public exploitNetwork attack vector

Process crash via unmatched IPv6 bracket

Published Jun 6, 2023 · Updated Jan 8, 2025

Buffer overflow in Sogou Workflow 0.10.6 allows remote attackers to crash a consuming process via a crafted URI ending in an unmatched bracket. URIParser::parse treats any host beginning with an opening bracket as bracketed IPv6, subtracts two from a zero-length host, and passes the resulting negative length to memcpy. Exploitation requires a consuming application to pass the crafted URI into the parser; the demonstrated consequence is a process crash.

CVSS severity8.8
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Sogou Workflow 0.10.6 allows remote attackers to crash a consuming process via a crafted URI ending in an unmatched bracket. URIParser::parse treats any host beginning with an opening bracket as bracketed IPv6, subtracts two from a zero-length host, and passes the resulting negative length to memcpy. Exploitation requires a consuming application to pass the crafted URI into the parser; the demonstrated consequence is a process crash.

The record

CVE
CVE-2023-33457
Published
Jun 6, 2023
Updated
Jan 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2025Record 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

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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