unrar.c in libclamav in ClamAV before 0.90.3 and 0.91 before 0.91rc1 allows remote attackers to cause a denial of service (core dump) via a
unrar.c in libclamav in ClamAV before 0.90.3 and 0.91 before 0.91rc1 allows remote attackers to cause a denial of service (core dump) via a crafted RAR file with a modified vm_codesize value, which triggers a heap-based buffer overflow.
- Published
- Jun 7, 2007
- Updated
- Jun 16, 2026
- EPSS
- 2.5% · 84th percentile
- CWE
- —
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.5%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| clam anti-virus | clamav | cpe:2.3:a:clam_anti-virus:clamav |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- clam anti-virus clamav0.90
- clam anti-virus clamav0.90_rc1.1
- clam anti-virus clamav0.90_rc2
- clam anti-virus clamav0.90_rc3
- clam anti-virus clamav0.90.1
- clam anti-virus clamav0.90.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | clamav | before 0.90.3-1 | 0.90.3-1 |
| Debian:3.1 | clamav | before 0.84-2.sarge.17 | 0.84-2.sarge.17 |
| Debian:4.0 | clamav | before 0.90.1-3etch3 | 0.90.1-3etch3 |
| Debian:5.0 | clamav | before 0.90.1-3.1lenny3 | 0.90.1-3.1lenny3 |
Same product
clam anti-virus: all recordsOther highest-scoring records for the same primary product.
- CVE-2007-4560clamav-milter in ClamAV before 0.91.2, when run in black hole mode, allows remote attackers to execute arbitrary commands via shell metachar55Plan
- CVE-2008-1100Buffer overflow in the cli_scanpe function in libclamav (libclamav/pe.c) for ClamAV 0.92 and 0.92.1 allows remote attackers to execute arbit43Plan
- CVE-2008-0318Integer overflow in the cli_scanpe function in libclamav in ClamAV before 0.92.1, as used in clamd, allows remote attackers to cause a denia42Plan
- CVE-2007-3023unsp.c in ClamAV before 0.90.3 and 0.91 before 0.91rc1 does not properly calculate the end of a certain buffer, with unknown impact and remo41Plan
- CVE-2005-3587Improper boundary checks in petite.c in Clam AntiVirus (ClamAV) before 0.87.1 allows attackers to perform unknown attacks via unknown vector41Plan
- CVE-2008-5050Off-by-one error in the get_unicode_name function (libclamav/vba_extract.c) in Clam Anti-Virus (ClamAV) before 0.94.1 allows remote attacker39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:clamav | 0.90.3-1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- kolab.org/security/kolab-vendor-notice-15.txt
- lurker.clamav.net/message/20070530.224918.5c64abc4.en.html
- osvdb.org/35522
- secunia.com/advisories/25523
- secunia.com/advisories/25525
- secunia.com/advisories/25688
- secunia.com/advisories/25796
- security.gentoo.org/glsa/glsa-200706-05.xml
- svn.clamav.net/svn/clamav-devel/trunk/ChangeLog
- www.debian.org/security/2007/dsa-1320
- www.novell.com/linux/security/advisories/2007_33_clamav.html
- www.securityfocus.com/bid/24289
- exchange.xforce.ibmcloud.com/vulnerabilities/34778
- wwws.clamav.net/bugzilla/show_bug.cgi?id=521
Vendor advisories and official records. Exploit/PoC links are deliberately left out.