USN-3840-1 (UBUNTU-CVE-2018-0734)
Vulnerability from osv_ubuntu – Published: 2018-12-06 17:43 – Updated: 2026-04-22 07:36 – Source website
VLAI
Summary
openssl, openssl1.0 vulnerabilities
Details
Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private DSA keys. (CVE-2018-0734)
Samuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)
Billy Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri, and Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading (SMT) architectures are vulnerable to side-channel leakage. This issue is known as "PortSmash". An attacker could possibly use this issue to perform a timing side-channel attack and recover private keys. (CVE-2018-5407)
References
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"score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
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},
{
"score": "low",
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]
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],
"ecosystem": "Ubuntu:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libssl1.0.0",
"binary_version": "1.0.2g-1ubuntu4.14"
},
{
"binary_name": "openssl",
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}
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},
"package": {
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"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
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"id": "CVE-2018-5407",
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],
"aliases": [],
"details": "Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An\nattacker could possibly use this issue to perform a timing side-channel\nattack and recover private DSA keys. (CVE-2018-0734)\n\nSamuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An\nattacker could possibly use this issue to perform a timing side-channel\nattack and recover private ECDSA keys. This issue only affected Ubuntu\n18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)\n\nBilly Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri,\nand Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading\n(SMT) architectures are vulnerable to side-channel leakage. This issue is\nknown as \"PortSmash\". An attacker could possibly use this issue to perform\na timing side-channel attack and recover private keys. (CVE-2018-5407)\n",
"id": "USN-3840-1",
"modified": "2026-04-22T07:36:36Z",
"published": "2018-12-06T17:43:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3840-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-0734"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-0735"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-5407"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "openssl, openssl1.0 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2018-0734",
"UBUNTU-CVE-2018-0735",
"UBUNTU-CVE-2018-5407"
]
}
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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.
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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.
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