CVE-2024-27355

highpriority · track · 0EPSS 0.006 · 47 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.57% (47th) EPSS

CVSS 7.5 · high

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID).

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-400USCWE-400US

affected products (15)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Andreas Fischer phpseclib≤ 1.0.23fstec_bduRU
Andreas Fischer phpseclib2.0.0 → 2.0.47fstec_bduRU
Andreas Fischer phpseclib3.0.0 → 3.0.36fstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 22.04 LTSfstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
phpseclib phpseclib1.0.0 → 1.0.23nvdUScpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
phpseclib phpseclib2.0.0 → 2.0.47nvdUScpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
phpseclib phpseclib3.0.0 → 3.0.36nvdUScpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
Packagist phpseclib/phpseclib0.1.1 → 1.0.23osvUSpkg:composer/phpseclib/phpseclib
Packagist phpseclib/phpseclib1.0.0 → 1.0.23osvUSpkg:composer/phpseclib/phpseclib
Packagist phpseclib/phpseclib2.0.0 → 2.0.47osvUSpkg:composer/phpseclib/phpseclib
Packagist phpseclib/phpseclib3.0.0 → 3.0.36osvUSpkg:composer/phpseclib/phpseclib

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-f2qx-66wf-wvvxphpseclib guardrails needed on OID length2026-05-08ghsa · osvUS
### Impact Any application using that loads untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc). ### Patches https://github.com/phpseclib/phpseclib/commit/e32531001b4d62c66c3d824ccef54ffad835eb59 ### Workarounds No. ### Resources https://github.com/phpseclib/phpseclib/commit/e32531001b4d62c66c3d824ccef54ffad835eb59 https://www.usenix.org/system/files/conference/usenixsecurity25/sec25cycle1-prepub-599-shi-bing.pdf
GHSA-jr22-8qgm-4q87Duplicate Advisory: phpseclib does not properly limit the ASN1 OID length2024-03-02ghsa · osvUS
### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-f2qx-66wf-wvvx. This link is maintained to preserve external references. ### Original Description An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID).

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2024-03-01modified 2026-06-17

references (13)

External citations — patches, advisories, analysis.

scry

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