clamav-milter in ClamAV before 0.91.2, when run in black hole mode, allows remote attackers to execute arbitrary commands via shell metachar
clamav-milter in ClamAV before 0.91.2, when run in black hole mode, allows remote attackers to execute arbitrary commands via shell metacharacters that are used in a certain popen call, involving the "recipient field of sendmail."
- Published
- Aug 27, 2007
- Updated
- Jun 16, 2026
- EPSS
- 83.5% · 100th percentile
- CWE
- CWE-78
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Report tools
Action score
55
Plan
Add it to your regular patch cycle.
- CVSS
- 30 / 40 · 7.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 25 / 30 · 83.5%
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 clamavup to 0.91.1 inclusive
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 0.91.2-1~volatile1 | 0.91.2-1~volatile1 |
| Debian:4.0 | clamav | before 0.90.1-3etch7 | 0.90.1-3etch7 |
Same product
clam anti-virus: all recordsOther highest-scoring records for the same primary product.
- 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
- CVE-2007-6335Integer overflow in libclamav in ClamAV before 0.92 allows remote attackers to execute arbitrary code via a crafted MEW packed PE file, whic36Monitor
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 | 0.91.2-1~volatile1 · Debian:12 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×3
- Proof-of-concept repository on GitHub ×2
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2010-10-09 |
| Exploit-DB entry | remote | 2007-08-24 |
| Exploit-DB entry | remote | 2007-12-21 |
| Metasploit module | exploit/unix/smtp/clamav_milter_blackholeClamAV Milter Blackhole-Mode Remote Code Executionexploit | 2007-08-24 |
| Proof-of-concept repository on GitHub | stars:0 | 2022-12-31 |
| Proof-of-concept repository on GitHub | stars:4 | 2025-12-07 |
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.
- First PoC-4 d
- Metasploit-4 d
- Published
- TodaySep 30, 2026+6974 d
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
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- High
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')CVSS vector
AV:N/AC:H/Au:N/C:C/I:C/A:C
nvd-primary
Root cause
User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.
The bug in code
The whole CWE-78 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const host = req.body.host;exec("ping -c 1 " + host, onResult);Fixed
const host = req.body.host;if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);execFile("ping", ["-c", "1", host], onResult);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Command DelimitersCAPEC-15likelihood: High · High
- Exploiting Multiple Input Interpretation LayersCAPEC-43likelihood: Medium · High
- Argument InjectionCAPEC-6likelihood: High · High
- OS Command InjectionCAPEC-88likelihood: High · High
ATT&CK techniques
—
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✗ → ✓
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References
- www.securityfocus.com/bid/25439
- www.securitytracker.com/id?1018610
- docs.info.apple.com/article.html?artnum=307562
- lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
- secunia.com/advisories/26654
- secunia.com/advisories/26674
- secunia.com/advisories/26683
- secunia.com/advisories/26751
- secunia.com/advisories/26822
- secunia.com/advisories/26916
- secunia.com/advisories/29420
- security.gentoo.org/glsa/glsa-200709-14.xml
- securityreason.com/securityalert/3063
- www.debian.org/security/2007/dsa-1366
- www.mandriva.com/security/advisories?name=MDKSA-2007:172
- www.novell.com/linux/security/advisories/2007_18_sr.html
- www.nruns.com/security_advisory_clamav_remote_code_exection.php
- www.securityfocus.com/archive/1/477723/100/0/threaded
- www.trustix.org/errata/2007/0026/
- www.vupen.com/english/advisories/2008/0924/references
Vendor advisories and official records. Exploit/PoC links are deliberately left out.