ubuntu-cve-2019-20454
Vulnerability from osv_ubuntu
Published
2020-02-14 14:15
Modified
2026-04-22 07:39
Summary
Details

An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.

Severity
5.1 (Medium)
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpcre2-16-0",
            "binary_version": "10.31-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpcre2-32-0",
            "binary_version": "10.31-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpcre2-8-0",
            "binary_version": "10.31-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpcre2-posix0",
            "binary_version": "10.31-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "pcre2-utils",
            "binary_version": "10.31-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "pcre2",
        "purl": "pkg:deb/ubuntu/pcre2@10.31-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.22-3",
        "10.22-4",
        "10.22-5",
        "10.22-6",
        "10.31-2",
        "10.31-2ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \\X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.",
  "id": "UBUNTU-CVE-2019-20454",
  "modified": "2026-04-22T07:39:14Z",
  "published": "2020-02-14T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-20454"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-20454"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-20454"
  ]
}



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