VAR-201901-1644
Vulnerability from variot - Updated: 2024-11-23 20:20LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete. LibVNC Contains an out-of-bounds vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. LibVNCServer is prone to a local heap-based buffer-overflow vulnerability. Attackers can exploit these issues to execute arbitrary code within the context of the user running the affected application. Failed attempts will likely cause a denial-of-service condition. Note: This issue is the result of an incomplete fix for issue CVE-2018-20019 described in 106821 (LibVNCServer CVE-2018-20019 Multiple Heap Buffer Overflow Vulnerabilities).
Software Description: - libvncserver: vnc server library
Details:
It was discovered that LibVNCServer incorrectly handled certain operations. ========================================================================= Ubuntu Security Notice USN-4587-1 October 20, 2020
italc vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in iTALC.
Software Description: - italc: didact tool which allows teachers to view and control computer labs
Details:
Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors and didn't check malloc return values. (CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)
Josef Gajdusek discovered that iTALC had heap-based buffer overflow vulnerabilities. (CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225, CVE-2019-15681)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 LTS: italc-client 1:2.0.2+dfsg1-4ubuntu0.1 italc-master 1:2.0.2+dfsg1-4ubuntu0.1 libitalccore 1:2.0.2+dfsg1-4ubuntu0.1
In general, a standard system update will make all the necessary changes.
References: https://usn.ubuntu.com/4587-1 CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055, CVE-2016-9941, CVE-2016-9942, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225, CVE-2019-15681
Package Information: https://launchpad.net/ubuntu/+source/italc/1:2.0.2+dfsg1-4ubuntu0.1
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"data": "LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete. LibVNC Contains an out-of-bounds vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. LibVNCServer is prone to a local heap-based buffer-overflow vulnerability. \nAttackers can exploit these issues to execute arbitrary code within the context of the user running the affected application. Failed attempts will likely cause a denial-of-service condition. \nNote: This issue is the result of an incomplete fix for issue CVE-2018-20019 described in 106821 (LibVNCServer CVE-2018-20019 Multiple Heap Buffer Overflow Vulnerabilities). \n\nSoftware Description:\n- libvncserver: vnc server library\n\nDetails:\n\nIt was discovered that LibVNCServer incorrectly handled certain operations. =========================================================================\nUbuntu Security Notice USN-4587-1\nOctober 20, 2020\n\nitalc vulnerabilities\n=========================================================================\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 16.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in iTALC. \n\nSoftware Description:\n- italc: didact tool which allows teachers to view and control computer labs\n\nDetails:\n\nNicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors\nand didn\u0027t check malloc return values. \n(CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)\n\nJosef Gajdusek discovered that iTALC had heap-based buffer overflow\nvulnerabilities. (CVE-2018-15127,\nCVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023,\nCVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225,\nCVE-2019-15681)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 16.04 LTS:\n italc-client 1:2.0.2+dfsg1-4ubuntu0.1\n italc-master 1:2.0.2+dfsg1-4ubuntu0.1\n libitalccore 1:2.0.2+dfsg1-4ubuntu0.1\n\nIn general, a standard system update will make all the necessary changes. \n\nReferences:\n https://usn.ubuntu.com/4587-1\n CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054,\n CVE-2014-6055, CVE-2016-9941, CVE-2016-9942, CVE-2018-15127,\n CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022,\n CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749,\n CVE-2018-20750, CVE-2018-7225, CVE-2019-15681\n\nPackage Information:\n https://launchpad.net/ubuntu/+source/italc/1:2.0.2+dfsg1-4ubuntu0.1\n",
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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
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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.
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.
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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.