CVE catalog

CVE-2021-45429

yara affected and fixed versions

A Buffer Overflow vulnerablity exists in VirusTotal YARA git commit: 605b2edf07ed8eb9a2c61ba22eb2e7c362f47ba7 via yr_set_configuration in yara/libyara/libyara.c, which could cause a Denial of Service.

Severity: Medium · CVSS 6.6CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Published: Jan 1, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.83% · Oct 27, 2026

Projects and upstream resources

[yara][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debiantrixie	yara	`4.5.2-1`	Fixed	[CVE-2021-45429]
Debiansid	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debiansid	yara	`4.5.8-1`	Fixed	[CVE-2021-45429]
Debianforky	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debianforky	yara	`4.5.8-1`	Fixed	[CVE-2021-45429]
Debianbookworm	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debianbookworm	yara	`4.2.3-4`	Fixed	[CVE-2021-45429]

Showing 8 fix observations. All 12 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debianbookworm	yara	`4.2.3-4`	Fixed	[CVE-2021-45429]
Debianforky	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debianforky	yara	`4.5.8-1`	Fixed	[CVE-2021-45429]
Debiansid	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debiansid	yara	`4.5.8-1`	Fixed	[CVE-2021-45429]
Debiantrixie	yara	`4.2.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-45429]
Debiantrixie	yara	`4.5.2-1`	Fixed	[CVE-2021-45429]
Ubuntupro	yara	`4.1.0-1`	UnknownSource applicability is not established	[USN-7177-1]Apr 27, 2026, 5:39:09 PM UTC[UBUNTU-CVE-2021-45429]Apr 22, 2026, 1:03:33 PM UTC
Ubuntupro	yara	`4.1.3-1`	UnknownSource applicability is not established	[USN-7177-1]Apr 27, 2026, 5:39:09 PM UTC[UBUNTU-CVE-2021-45429]Apr 22, 2026, 1:03:33 PM UTC
Ubuntupro	yara	`4.1.3-1build1`	UnknownSource applicability is not established	[USN-7177-1]Apr 27, 2026, 5:39:09 PM UTC[UBUNTU-CVE-2021-45429]Apr 22, 2026, 1:03:33 PM UTC
Ubuntupro	yara	`4.1.3-1ubuntu0.1~esm1`	UnknownSource applicability is not established	[USN-7177-1]Apr 27, 2026, 5:39:09 PM UTC[UBUNTU-CVE-2021-45429]Apr 22, 2026, 1:03:33 PM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "yara",
      "status": "fixed",
      "release": "sid",
      "version": "4.5.8-1"
    },
    {
      "name": "yara",
      "status": "fixed",
      "release": "forky",
      "version": "4.5.8-1"
    },
    {
      "name": "yara",
      "status": "fixed",
      "release": "trixie",
      "version": "4.5.2-1"
    },
    {
      "name": "yara",
      "status": "fixed",
      "release": "bookworm",
      "version": "4.2.3-4"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "yara",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.0-1"
    },
    {
      "bug": null,
      "name": "yara",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.0-1"
    },
    {
      "bug": null,
      "name": "yara",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.0-1"
    },
    {
      "bug": null,
      "name": "yara",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.0-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "yara",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.3-1ubuntu0.1~esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "4.1.0-1",
        "4.1.3-1",
        "4.1.3-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-7177-1",
      "fixed_version": "4.1.3-1ubuntu0.1~esm1",
      "provider_source": "pypi",
      "provider_record_id": "USN-7177-1",
      "provider_updated_at": "2026-04-27T17:39:09.557522Z",
      "applicability_unknown": true
    },
    {
      "name": "yara",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.3-1ubuntu0.1~esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "4.1.0-1",
        "4.1.3-1",
        "4.1.3-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-45429",
      "fixed_version": "4.1.3-1ubuntu0.1~esm1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-45429",
      "provider_updated_at": "2026-04-22T13:03:33.456851Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libyara10]Unknown
Source package: [yara]
Details (2)
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[libyara9]Unknown
Source package: [yara]
Details (2)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[libyara-dev]Unknown
Source package: [yara]
Details (4)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[yara]Unknown
Details (4)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[yara-doc]Unknown
Source package: [yara]
Details (4)
- 4.2.3-4 · all · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · all · bookworm
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · bookworm; dsa · yara · debian · 12

[Debian 13 (Trixie)]

[libyara10]Unknown
Source package: [yara]
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
[libyara-dev]Unknown
Source package: [yara]
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
[yara]Unknown
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
[yara-doc]Unknown
Source package: [yara]
Details (2)
- 4.5.2-1 · all · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13
- 4.5.2-1 · all · trixie
  Fixed · Fixed: 4.2.0-1
  dsa · yara · debian · 13

Observed: Oct 23, 2026, 6:03:54 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]