gsd-2021-3695
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.
Aliases
Aliases
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"GSD": {
"alias": "CVE-2021-3695",
"description": "A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.",
"id": "GSD-2021-3695",
"references": [
"https://security.archlinux.org/CVE-2021-3695",
"https://linux.oracle.com/cve/CVE-2021-3695.html",
"https://access.redhat.com/errata/RHSA-2022:5095",
"https://access.redhat.com/errata/RHSA-2022:5096",
"https://access.redhat.com/errata/RHSA-2022:5098",
"https://access.redhat.com/errata/RHSA-2022:5099",
"https://access.redhat.com/errata/RHSA-2022:5100",
"https://www.suse.com/security/cve/CVE-2021-3695.html"
]
},
"gsd": {
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"remediation": "unknown",
"reportConfidence": "confirmed",
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"id": "GSD-2021-3695",
"modified": "2023-12-13T01:23:34.911373Z",
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"vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
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"lastModifiedDate": "2023-09-13T16:15Z",
"publishedDate": "2022-07-06T16:15Z"
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.