unzoo.c, as used in multiple products including AMaViS 2.4.1 and earlier, allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.
Conclusion & alert: CVE-2007-1673 is rated High Exploit Risk (74.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.42%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-02 | 1.16% | 1.42% | +0.26% |
| 2 | 2025-12-26 | 1.12% | 1.16% | +0.05% |
| 3 | 2025-11-30 | — | 1.12% | — |
Full EPSS history (16 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
ubuntu
|
medium | CVE-2007-1673 medium priority: Ubuntu including 2 source packages (unzoo, zoo), 18 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 7, ignored 6, DNE 3, needs-triage 2. | https://ubuntu.com/security/CVE-2007-1673 |
: http://xforce.iss.net/xforce/xfdb/34080 For Barracuda Spam Firewall: Upgrade to the latest virus definition version of Barracuda Spam Firewall (virusdef 2.0.6399 for 3.4 and after or virusdef 2.0.6399o for prior to 3.4), available from the automatic update. For Panda Software Antivirus: Upgrade to the latest version of Panda Software Antivirus (4/2/2007 or later), available from the automatic update feature. For avast! antivirus: Upgrade to the latest version of Panda Software Antivirus (4.7.981 or later), available from the avast! antivirus Web site. See references. For Avira AntiVir: Upgrade to the latest version of Avira AntiVir (avpack32.dll version 7.3.0.6 or later), available from the automatic update feature. For AMaViS: Refer to ASA-2007-2 for patch, upgrade, or suggested workaround information. See References.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| amavis | amavis | <= 2.4.1 | cpe:2.3:a:amavis:amavis:*:*:*:*:*:*:*:* |
| avast | avast_antivirus | <= 4.7.980 | cpe:2.3:a:avast:avast_antivirus:*:*:*:*:*:*:*:* |
| avast | avast_antivirus | 4.6.394 | cpe:2.3:a:avast:avast_antivirus:4.6.394:*:*:*:*:*:*:* |
| avast | avast_antivirus | 4.7.652 | cpe:2.3:a:avast:avast_antivirus:4.7.652:*:*:*:*:*:*:* |
| avast | avast_antivirus | 4.7.700 | cpe:2.3:a:avast:avast_antivirus:4.7.700:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.0 | cpe:2.3:a:avast:avast_antivirus_home:4.0:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.6 | cpe:2.3:a:avast:avast_antivirus_home:4.6:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.6.652 | cpe:2.3:a:avast:avast_antivirus_home:4.6.652:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.6.655 | cpe:2.3:a:avast:avast_antivirus_home:4.6.655:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.6.665 | cpe:2.3:a:avast:avast_antivirus_home:4.6.665:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.6.691 | cpe:2.3:a:avast:avast_antivirus_home:4.6.691:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.827 | cpe:2.3:a:avast:avast_antivirus_home:4.7.827:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.827 | cpe:2.3:a:avast:avast_antivirus_home:4.7.827:*:windows:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.844 | cpe:2.3:a:avast:avast_antivirus_home:4.7.844:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.844 | cpe:2.3:a:avast:avast_antivirus_home:4.7.844:*:windows:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.869 | cpe:2.3:a:avast:avast_antivirus_home:4.7.869:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.869 | cpe:2.3:a:avast:avast_antivirus_home:4.7.869:*:windows:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.1043 | cpe:2.3:a:avast:avast_antivirus_home:4.7.1043:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.1043 | cpe:2.3:a:avast:avast_antivirus_home:4.7.1043:*:windows:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.1098 | cpe:2.3:a:avast:avast_antivirus_home:4.7.1098:*:*:*:*:*:*:* |
| avast | avast_antivirus_home | 4.7.1098 | cpe:2.3:a:avast:avast_antivirus_home:4.7.1098:*:windows:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.0 | cpe:2.3:a:avast:avast_antivirus_professional:4.0:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.6 | cpe:2.3:a:avast:avast_antivirus_professional:4.6:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.6.603 | cpe:2.3:a:avast:avast_antivirus_professional:4.6.603:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.6.652 | cpe:2.3:a:avast:avast_antivirus_professional:4.6.652:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.6.665 | cpe:2.3:a:avast:avast_antivirus_professional:4.6.665:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.6.691 | cpe:2.3:a:avast:avast_antivirus_professional:4.6.691:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.827 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.827:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.827 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.827:*:windows:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.844 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.844:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.844 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.844:*:windows:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.869 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.869:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.1043 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.1043:*:*:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.1043 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.1043:*:windows:*:*:*:*:* |
| avast | avast_antivirus_professional | 4.7.1098 | cpe:2.3:a:avast:avast_antivirus_professional:4.7.1098:*:*:*:*:*:*:* |
| avira | antivir | — | cpe:2.3:a:avira:antivir:*:*:*:*:*:*:*:* |
| avira | antivir | 6.35.00.00 | cpe:2.3:a:avira:antivir:6.35.00.00:*:*:*:*:*:*:* |
| avira | antivir | 7.04.00.23 | cpe:2.3:a:avira:antivir:7.04.00.23:*:*:*:*:*:*:* |
| avira | antivir_personal | — | cpe:2.3:a:avira:antivir_personal:*:*:*:*:*:*:*:* |
| avira | antivir_personal | — | cpe:2.3:a:avira:antivir_personal:*:*:classic:*:*:*:*:* |
| avira | antivir_personal | — | cpe:2.3:a:avira:antivir_personal:*:*:premium:*:*:*:*:* |
| avira | antivir_personal | <= 7.3.0.5 | cpe:2.3:a:avira:antivir_personal:*:*:*:*:*:*:*:* |
| avira | antivir_personal | 7 | cpe:2.3:a:avira:antivir_personal:7:*:*:*:*:*:*:* |
| avira | antivir_personal | 7 | cpe:2.3:a:avira:antivir_personal:7:*:classic:*:*:*:*:* |
| panda | panda_antivirus | 2007 | cpe:2.3:a:panda:panda_antivirus:2007:*:*:*:*:*:*:* |
| panda | panda_antivirus_and_firewall | 2007 | cpe:2.3:a:panda:panda_antivirus_and_firewall:2007:*:*:*:*:*:*:* |
| picozip | picozip | — | cpe:2.3:a:picozip:picozip:*:*:*:*:*:*:*:* |
| rahul_dhesi | zoo | <= 2.10 | cpe:2.3:a:rahul_dhesi:zoo:*:*:*:*:*:*:*:* |
| unzoo | unzoo | 4.4 | cpe:2.3:a:unzoo:unzoo:4.4:*:*:*:*:*:*:* |
| winace | winace | — | cpe:2.3:a:winace:winace:*:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | — | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:*:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_100 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_100:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_200 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_200:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_300 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_300:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_400 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_400:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_500 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_500:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_600 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_600:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_800 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_800:*:*:*:*:*:*:* |
| barracuda_networks | barracuda_spam_firewall | model_900 | cpe:2.3:h:barracuda_networks:barracuda_spam_firewall:model_900:*:*:*:*:*:*:* |