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CVE-2017-5924

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after...

7.5 HighFix available

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.59%Up 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
CVE-2017-5924
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
CVE-2017-5924
Updated
2026-11-02
EUVDEUVD-2017-14999 No score

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
EUVD-2017-14999
Updated
2026-11-03
GitHub AdvisoriesGHSA-33qw-wpjx-355w 7.5

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after...

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
GHSA-33qw-wpjx-355w
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 7.5

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
CVE-2017-5924
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2017-5924 7.5

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
DEBIAN-CVE-2017-5924
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2017-5924 7.5

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_compiler_destroy function.

Record
UBUNTU-CVE-2017-5924
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
yara
Debian:12
 before 3.5.0+dfsg-9
3.5.0+dfsg-9
yara
Debian:13
 before 3.5.0+dfsg-9
3.5.0+dfsg-9
yara
Debian:14
 before 3.5.0+dfsg-9
3.5.0+dfsg-9
yara
Ubuntu:Pro:16.04:LTS
 before 3.4.0+dfsg-2ubuntu0.1~esm1, plus listed versions
3.4.0+dfsg-23.4.0+dfsg-2build1
3.4.0+dfsg-2ubuntu0.1~esm1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5924 is a high vulnerability (CVSS 7.5) in Virustotal Yara, published April 3, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. Fixed in yara 3.5.0+dfsg-9.

References

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