ubuntu-cve-2017-7805
Vulnerability from osv_ubuntu
Published
2017-09-29 00:00
Modified
2026-04-22 07:38
Summary
Details
During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
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"availability": "No subscription required",
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{
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{
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{
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"package": {
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{
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{
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{
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{
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{
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"name": "thunderbird",
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{
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{
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"availability": "No subscription required",
"binaries": [
{
"binary_name": "thunderbird",
"binary_version": "1:52.4.0+build1-0ubuntu2"
},
{
"binary_name": "thunderbird-globalmenu",
"binary_version": "1:52.4.0+build1-0ubuntu2"
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{
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{
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},
{
"binary_name": "thunderbird-testsuite",
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},
{
"binary_name": "xul-ext-calendar-timezones",
"binary_version": "1:52.4.0+build1-0ubuntu2"
},
{
"binary_name": "xul-ext-gdata-provider",
"binary_version": "1:52.4.0+build1-0ubuntu2"
},
{
"binary_name": "xul-ext-lightning",
"binary_version": "1:52.4.0+build1-0ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "thunderbird",
"purl": "pkg:deb/ubuntu/thunderbird@1:52.4.0+build1-0ubuntu2?arch=source\u0026distro=bionic"
},
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],
"aliases": [],
"details": "During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox \u003c 56, Firefox ESR \u003c 52.4, and Thunderbird \u003c 52.4.",
"id": "UBUNTU-CVE-2017-7805",
"modified": "2026-04-22T07:38:14Z",
"published": "2017-09-29T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2017-7805"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2017-22/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3431-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3435-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3436-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-7805"
}
],
"related": [
"USN-3431-1",
"USN-3435-1",
"USN-3436-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2017-7805"
]
}
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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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