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Canonical CNA: add CVE-2021-3489 Linux kernel

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Linux kernel eBPF RINGBUF map oversized allocation

Signed-off-by: Steve Beattie <steve.beattie@canonical.com>
This commit is contained in:
Steve Beattie 2021-06-03 16:25:49 -07:00
parent a04a80c875
commit a082097c65
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GPG Key ID: 2F099E8D005E81F4
1 changed files with 130 additions and 6 deletions
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2021/3xxx/CVE-2021-3489.json
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@ -1,18 +1,142 @@
{
"data_type": "CVE",
"data_format": "MITRE",
"data_version": "4.0",
"CVE_data_meta": {
"ASSIGNER": "security@ubuntu.com",
"DATE_PUBLIC": "2021-05-11 17:00 +0000",
"ID": "CVE-2021-3489",
"ASSIGNER": "cve@mitre.org",
"STATE": "RESERVED"
"STATE": "PUBLIC",
"TITLE": "Linux kernel eBPF RINGBUF map oversized allocation"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux kernel",
"version": {
"version_data": [
{
"version_affected": "<",
"version_name": "trunk",
"version_value": "v5.13-rc4"
},
{
"version_affected": "<",
"version_name": "linux-5.12.y",
"version_value": "v5.12.4"
},
{
"version_affected": "<",
"version_name": "linux-5.11.y",
"version_value": "v5.11.21"
},
{
"version_affected": "<",
"version_name": "linux-5.10.y",
"version_value": "v5.10.37"
},
{
"version_affected": ">=",
"version_name": "5.8",
"version_value": "v5.8"
}
]
}
}
]
},
"vendor_name": "Linux"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Ryota Shiga (@Ga_ryo_) of Flatt Security working with Trend Micro's Zero Day Initiative"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
"value": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1)."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-787 Out-of-bounds Write"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "[oss-security] CVE-2021-3489 - Linux kernel eBPF RINGBUF map oversized allocation",
"refsource": "MLIST",
"url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
},
{
"name": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea",
"refsource": "MISC",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
},
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
},
{
"name": "https://ubuntu.com/security/notices/USN-4950-1",
"refsource": "UBUNTU",
"url": "https://ubuntu.com/security/notices/USN-4950-1"
},
{
"name": "https://ubuntu.com/security/notices/USN-4949-1",
"refsource": "UBUNTU",
"url": "https://ubuntu.com/security/notices/USN-4949-1"
}
]
},
"source": {
"discovery": "EXTERNAL"
}
}