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Fencer Vulns
medium 5.3

CVE-2023-6681 json

Jwcrypto: denail of service via specifically crafted jwe

published 2023-12-28 2 y ago modified 2026-11-05 4 d ago also EUVD-2024-0081 , GHSA-cw2r-4p82-qv79 , PYSEC-2024-104

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

A vulnerability was found in JWCrypto. This flaw allows an attacker to cause a denial of service (DoS) attack and possible password brute-force and dictionary attacks to be more resource-intensive. This issue can result in a large amount of computational consumption, causing a denial of service attack.

Patch / fix

  • pypi jwcrypto 1.5.1
  • Red Hat Red Hat Enterprise Linux 8 8100020240416171943.823393f5, 8100020240417004735.143e9e98
  • Red Hat Red Hat Enterprise Linux 9 0:1.5.6-2.el9
  • python-jwcrypto Debian 14, Debian 13 1.5.4-1

debian advisories DEBIAN-CVE-2023-6681

  • python-jwcrypto RHEL 9 1.5.6-2.el9
  • python3-jwcrypto RHEL 9 1.5.6-2.el9
  • ipa RHEL 8 4.9.13-9.module+el8.10.0+21692+c9b201bc
  • pyusb RHEL 8 1.0.0-9.1.module+el8.9.0+18920+2223d05e
  • softhsm RHEL 8 2.6.0-5.module+el8.9.0+18911+94941f82
  • custodia RHEL 8 0.6.0-3.module+el8.9.0+18911+94941f82
  • slapi-nis RHEL 8 0.60.0-4.module+el8.10.0+20723+03062ebd
  • ipa-client RHEL 8 4.9.13-9.module+el8.10.0+21692+c9b201bc

red hat advisories RHSA-2024:9281RHSA-2024:3267

  • python3-jwcrypto AlmaLinux 9 1.5.6-2.el9

almalinux advisories ALSA-2024:9281

  • python-jwcrypto Rocky Linux 9 1.5.6-2.el9
  • ipa Rocky Linux 8 4.9.13-9.module+el8.10.0+1818+2dfda7a6
  • pyusb Rocky Linux 8 1.0.0-9.1.module+el8.9.0+1371+ffa84eb9
  • softhsm Rocky Linux 8 2.6.0-5.module+el8.9.0+1371+ffa84eb9
  • custodia Rocky Linux 8 0.6.0-3.module+el8.9.0+1371+ffa84eb9
  • slapi-nis Rocky Linux 8 0.60.0-4.module+el8.9.0+1573+39ab85f4
  • opendnssec Rocky Linux 8 2.1.7-1.module+el8.9.0+1371+ffa84eb9
  • python-qrcode Rocky Linux 8 5.1-12.module+el8.9.0+1371+ffa84eb9

rocky linux advisories RLSA-2024:9281RLSA-2024:3267

  • py3-jwcrypto Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.5.1-r0

alpine advisories ALPINE-CVE-2023-6681

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-6681 updated cvss 5.3

JWCrypto: denail of service Via specifically crafted JWE

  • Red Hat Enterprise Linux 7 python-jwcrypto
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) ipa 4.9.13-9.module+el8.10.0+21691+df63127d, ipa 4.9.13-9.module+el8.10.0+21692+c9b201bc, pyusb 1.0.0-9.1.module+el8.9.0+18911+94941f82, pyusb 1.0.0-9.1.module+el8.9.0+18920+2223d05e, softhsm 2.6.0-5.module+el8.9.0+18911+94941f82, custodia 0.6.0-3.module+el8.9.0+18911+94941f82, +50 more
    fixed: vendor fix RHSA-2024:3267
  • Red Hat Enterprise Linux AppStream (v. 9) python-jwcrypto 1.5.6-2.el9, python3-jwcrypto 1.5.6-2.el9
    fixed: vendor fix RHSA-2024:9281
  • Red Hat Ansible Automation Platform 2 automation-controller
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
pypi jwcrypto
<1.5.1
1.5.1

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Ansible Automation Platform 2
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.