CVE-2021-45429
A Buffer Overflow vulnerablity exists in VirusTotal YARA git commit:...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-45429- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-120
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-45429- Updated
- 2026-11-02
EUVDEUVD-2021-32200 No score
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.
- Record
EUVD-2021-32200- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fr63-458q-29q2
A Buffer Overflow vulnerablity exists in VirusTotal YARA git commit:...
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.
- Record
GHSA-fr63-458q-29q2- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-120
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-45429
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.
- Record
ALPINE-CVE-2021-45429- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
OSV
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.
- Record
CVE-2021-45429- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-45429
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.
- Record
DEBIAN-CVE-2021-45429- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-45429
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.
- Record
UBUNTU-CVE-2021-45429- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUSN-7177-1 No score
yara vulnerability
It was discovered that YARA did not properly sanitize its configuration settings. An attacker could potentially exploit this issue to cause a denial of service.
- Record
USN-7177-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
yaraAlpine:v3.19 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraAlpine:v3.20 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraAlpine:v3.21 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraAlpine:v3.22 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraAlpine:v3.23 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraAlpine:v3.24 |
before 4.2.0-r0 | 4.2.0-r0 |
yaraDebian:12 |
before 4.2.0-1 | 4.2.0-1 |
yaraDebian:13 |
before 4.2.0-1 | 4.2.0-1 |
yaraDebian:14 |
before 4.2.0-1 | 4.2.0-1 |
yaraUbuntu:Pro:18.04:LTS |
before 3.7.1-1ubuntu2+esm1, plus listed versions 3.6.3+dfsg-1ubuntu13.7.1-1ubuntu13.7.1-1ubuntu2 |
3.7.1-1ubuntu2+esm1 |
yaraUbuntu:Pro:20.04:LTS |
before 3.9.0-1ubuntu0.1~esm1, plus listed versions 3.9.0-1 |
3.9.0-1ubuntu0.1~esm1 |
yaraUbuntu:Pro:22.04:LTS |
before 4.1.3-1ubuntu0.1~esm1, plus listed versions 4.1.0-14.1.3-14.1.3-1build1 |
4.1.3-1ubuntu0.1~esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45429 is a medium vulnerability (CVSS 5.5) in Virustotal Yara, published February 4, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in yara 4.2.0-r0.
References
github.com/VirusTotal/yara/issues/1616
nvd.nist.gov/vuln/detail/CVE-2021-45429
security.alpinelinux.org/vuln/CVE-2021-45429
security-tracker.debian.org/tracker/CVE-2021-45429
ubuntu.com/security/CVE-2021-45429
cve.org/CVERecord?id=CVE-2021-45429