CVE-2026-103600

Что произошло

Uncontrolled recursion in the ASN.1 parser (Asn1InputStream, Asn1StreamParser) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements (for example SEQUENCE inside SEQUENCE, in definite-length DER or indefinite-length BER form), because each nesting level is parsed by a further recursive call with no bound on depth. About 2,000 levels (8 KB of DER) are enough to exhaust a 1.5 MB thread stack, the .NET main-thread default on Windows, and raise a StackOverflowException, which .NET cannot catch and which terminates the whole process; on threads with larger stacks, parse time instead grows quadratically with depth (about 9 seconds of CPU for a 64 KB input). Any path that parses untrusted ASN.1 is exposed, including X.509 certificates and CRLs, CMS/PKCS#7, PKCS#8/PKCS#12, OCSP and TLS Certificate messages.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "*",
  "versionEndExcluding": "2.7.0"
}

cpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:*

CVSS: оценки и векторы

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Источники и ссылки

{
  "cwes": [
    "ghsa",
    "nvd"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-10-28T15:05:44.835462+00:00"
  },
  "title": {
    "source": "ghsa",
    "received_at": "2026-10-28T15:59:53.572978+00:00"
  },
  "scores": [
    "ghsa",
    "nvd"
  ],
  "status": {
    "source": "nvd",
    "received_at": "2026-10-28T14:59:12.284208+00:00"
  },
  "affected": [
    "nvd"
  ],
  "published": {
    "source": "nvd",
    "received_at": "2026-10-28T14:59:12.284208+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-10-28T15:05:44.835462+00:00"
  },
  "references": [
    "ghsa",
    "nvd"
  ],
  "description": {
    "source": "nvd",
    "received_at": "2026-10-28T14:59:12.284208+00:00"
  },
  "workarounds": [],
  "configurations": [
    "nvd"
  ]
}

Хронология записи

1. Данные обновлены28.10.2026, 18:59
2. Данные обновлены28.10.2026, 18:05
3. Появились сведения об исправлении28.10.2026, 17:59

Личная заметка и статус

Другие CVE того же продукта