Vulnerability-Lookup

RHSA-2018_3600

Vulnerability from csaf_redhat - Published: 2018-11-13 22:13 - Updated: 2024-11-14 23:46

Summary

Red Hat Security Advisory: python-cryptography security update

Severity

Moderate

Notes

Topic: An update for python-cryptography is now available for Red Hat OpenStack Platform 13.0 (Queens). Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: The python-cryptography packages contain a Python Cryptographic Authority's (PyCA's) cryptography library, which provides cryptographic primitives and recipes to Python developers. Security Fix(es): * python-cryptography: GCM tag forgery via truncated tag in finalize_with_tag API (CVE-2018-10903) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2018-10903

A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.

7.5 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-20 - Improper Input Validation

Affected products

Fixed 10 products

Product	Version	Remediation
Unresolved product id: 7Server-RH7-RHOS-13.0:python-cryptography-0:2.1.4-3.el7ost.src	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-13.0:python2-cryptography-0:2.1.4-3.el7ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-13.0:python2-cryptography-0:2.1.4-3.el7ost.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-0:2.1.4-3.el7ost.src	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python2-cryptography-0:2.1.4-3.el7ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python2-cryptography-0:2.1.4-3.el7ost.x86_64	—	Vendor Fix fix

Threats

Impact Moderate

References

8 references

URL	Category
https://access.redhat.com/errata/RHSA-2018:3600	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=1602931	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2018-10903	self
https://bugzilla.redhat.com/show_bug.cgi?id=1602931	external
https://www.cve.org/CVERecord?id=CVE-2018-10903	external
https://nvd.nist.gov/vuln/detail/CVE-2018-10903	external

JSON

To clipboard

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          "text": "A flaw was found in python-cryptography versions between \u003e=1.9.0 and \u003c2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.",
          "title": "Vulnerability description"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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            "7Server-RH7-RHOS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.x86_64",
            "7Server-RH7-RHOS-13.0:python2-cryptography-0:2.1.4-3.el7ost.ppc64le",
            "7Server-RH7-RHOS-13.0:python2-cryptography-0:2.1.4-3.el7ost.x86_64",
            "7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-0:2.1.4-3.el7ost.src",
            "7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.ppc64le",
            "7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python-cryptography-debuginfo-0:2.1.4-3.el7ost.x86_64",
            "7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python2-cryptography-0:2.1.4-3.el7ost.ppc64le",
            "7Server-RH7-RHOS-DEPLOYMENT-TOOLS-13.0:python2-cryptography-0:2.1.4-3.el7ost.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-cryptography: GCM tag forgery via truncated tag in finalize_with_tag API"
    }
  ]
}

CVE-2018-10903 (GCVE-0-2018-10903)

Vulnerability from cvelistv5 – Published: 2018-07-30 15:00 – Updated: 2024-08-05 07:54

Summary

Severity ?

7.5 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-20

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2018:3600	vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3720-1/	vendor-advisoryx_refsource_UBUNTU
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://github.com/pyca/cryptography/pull/4342/co…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
[UNKNOWN]	python-cryptography	Affected: 2.3

Date Public ?

2018-07-18 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2018_3600

CVE-2018-10903 (GCVE-0-2018-10903)

Tags

Sightings

Nomenclature