Vulnerability-Lookup

RHSA-2012:0061

Vulnerability from csaf_redhat - Published: 2012-01-24 21:28 - Updated: 2025-11-21 17:39

Summary

Red Hat Security Advisory: kernel-rt security update

Severity

Important

Notes

Topic: Updated kernel-rt packages that fix one security issue are now available for Red Hat Enterprise MRG 2.1. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Details: The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: * It was found that permissions were not checked properly in the Linux kernel when handling the /proc/[pid]/mem writing functionality. A local, unprivileged user could use this flaw to escalate their privileges. Refer to Red Hat Knowledgebase article DOC-69129, linked to in the References, for further information. (CVE-2012-0056, Important) Red Hat would like to thank Jüri Aedla for reporting this issue. Users should upgrade to these updated packages, which correct this issue. The system must be rebooted for this update to take effect.

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-2012-0056

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/<pid>/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.

7.2 ()


                
                  AV:L/AC:L/Au:N/C:C/I:C/A:C

CWE-863 - Incorrect Authorization

Affected products

Fixed 16 products

Product	Version	Remediation
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-0:3.0.9-rt26.46.el6rt.src	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-devel-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-doc-0:3.0.9-rt26.46.el6rt.noarch	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.0.9-rt26.46.el6rt.noarch	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64	—	Vendor Fix fix

Threats

Impact Important

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2012:0061	self
https://access.redhat.com/security/updates/classi…	external
https://access.redhat.com/kb/docs/DOC-69129	external
https://bugzilla.redhat.com/show_bug.cgi?id=782642	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2012-0056	self
https://bugzilla.redhat.com/show_bug.cgi?id=782642	external
https://www.cve.org/CVERecord?id=CVE-2012-0056	external
https://nvd.nist.gov/vuln/detail/CVE-2012-0056	external

Acknowledgments

Jüri Aedla

JSON

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      "cwe": {
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        "name": "Incorrect Authorization"
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          "title": "Vulnerability description"
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          "text": "This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as it did not backport the upstream commit 198214a7ee. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0052.html and  https://rhn.redhat.com/errata/RHSA-2012-0061.html. For more information, please read https://access.redhat.com/kb/docs/DOC-69129.",
          "title": "Statement"
        },
        {
          "category": "general",
          "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.",
          "title": "CVSS score applicability"
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}

CVE-2012-0056 (GCVE-0-2012-0056)

Vulnerability from cvelistv5 – Published: 2012-01-27 15:00 – Updated: 2024-08-06 18:09

Summary

Severity

No CVSS data available.

CWE

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1082 records in the last 180 days details

References

14 references

URL	Tags
http://www.securityfocus.com/bid/51625	vdb-entryx_refsource_BID
http://blog.zx2c4.com/749	x_refsource_MISC
http://git.kernel.org/?p=linux/kernel/git/torvald…	x_refsource_CONFIRM
http://ubuntu.com/usn/usn-1336-1	vendor-advisoryx_refsource_UBUNTU
http://www.redhat.com/support/errata/RHSA-2012-00…	vendor-advisoryx_refsource_REDHAT
http://secunia.com/advisories/47708	third-party-advisoryx_refsource_SECUNIA
http://www.openwall.com/lists/oss-security/2012/01/19/4	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2012/01/18/2	mailing-listx_refsource_MLIST
http://www.redhat.com/support/errata/RHSA-2012-00…	vendor-advisoryx_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2012/01/18/1	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2012/01/22/4	mailing-listx_refsource_MLIST
https://bugzilla.redhat.com/show_bug.cgi?id=782642	x_refsource_CONFIRM
http://www.kernel.org/pub/linux/kernel/v3.x/Chang…	x_refsource_CONFIRM
http://www.kb.cert.org/vuls/id/470151	third-party-advisoryx_refsource_CERT-VN

Date Public

2012-01-17 00:00

Show details on NVD website

JSON

To clipboard

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          "tags": [
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            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/47708"
        },
        {
          "name": "[oss-security] 20120119 Re: CVE request: kernel: proc: clean up and fix /proc/\u003cpid\u003e/mem handling",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2012/01/19/4"
        },
        {
          "name": "[oss-security] 20120117 Re: CVE request: kernel: proc: clean up and fix /proc/\u003cpid\u003e/mem handling",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2012/01/18/2"
        },
        {
          "name": "RHSA-2012:0061",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "http://www.redhat.com/support/errata/RHSA-2012-0061.html"
        },
        {
          "name": "[oss-security] 20120118 CVE request: kernel: proc: clean up and fix /proc/\u003cpid\u003e/mem handling",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2012/01/18/1"
        },
        {
          "name": "[oss-security] 20120122 Re: CVE request: kernel: proc: clean up and fix /proc/\u003cpid\u003e/mem handling",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2012/01/22/4"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=782642"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2"
        },
        {
          "name": "VU#470151",
          "tags": [
            "third-party-advisory",
            "x_refsource_CERT-VN"
          ],
          "url": "http://www.kb.cert.org/vuls/id/470151"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2012-0056",
    "datePublished": "2012-01-27T15:00:00.000Z",
    "dateReserved": "2011-12-07T00:00:00.000Z",
    "dateUpdated": "2024-08-06T18:09:17.348Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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