CVE-2022-29930Network attack vector

Cryptographic integrity failure via ignored SHA-1 input

Published May 12, 2022 · Updated Aug 3, 2024

Cryptographic failure in JetBrains Ktor Native 2.0.0 allows attackers to obtain identical SHA-1 digests for different inputs. The sha1(ByteArray) wrapper in ktor-utils/posix called Sha1().digest() without passing its bytes argument, so it always hashed empty input. Reachability requires application code compiled for Kotlin/Native to call the affected helper; the resulting digest does not represent the supplied data.

CVSS severity8.7
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic failure in JetBrains Ktor Native 2.0.0 allows attackers to obtain identical SHA-1 digests for different inputs. The sha1(ByteArray) wrapper in ktor-utils/posix called Sha1().digest() without passing its bytes argument, so it always hashed empty input. Reachability requires application code compiled for Kotlin/Native to call the affected helper; the resulting digest does not represent the supplied data.

The record

CVE
CVE-2022-29930
Published
May 12, 2022
Updated
Aug 3, 2024
Vendor
JetBrains
Product
Ktor
Classifications
CWE-342, CWE-330
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=2.0.0
  2. Affected versionversion=2.0.1 <2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

JetBrains · Ktorversion=2.0.0; version=2.0.1 <2.0.1

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
8.7JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-342Predictable Exact Value from Previous Values
CWE-330Use of Insufficiently Random Values

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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