CVE-2007-4577

CVE-2007-4577 is a high-severity vulnerability in Sophos Anti-virus with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: High (CVSS 2.0 base score 7.8)
• EPSS exploit prediction: 6% (92nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Sophos Anti-virus
• Published: 2007-08-28
• Last modified: 2026-06-16

Description

Sophos Anti-Virus for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed BZip file that results in the creation of multiple Engine temporary files (aka a "BZip bomb").

Frequently asked questions

What is CVE-2007-4577?

Sophos Anti-Virus for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed BZip file that results in the creation of multiple Engine temporary files (aka a "BZip bomb").

How severe is CVE-2007-4577?

CVE-2007-4577 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-4577 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4577?

CVE-2007-4577 primarily affects Sophos Anti-virus. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4577?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-4577 published?

CVE-2007-4577 was published on 2007-08-28 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/26580
• http://securityreason.com/securityalert/3073
• http://securitytracker.com/id?1018608
• http://www.nruns.com/security_advisory_sophos_gzip_infinite_loop_dos.php
• http://www.securityfocus.com/archive/1/477727/100/0/threaded
• http://www.securityfocus.com/bid/25428
• http://www.sophos.com/support/knowledgebase/article/28407.html
• http://www.vupen.com/english/advisories/2007/2972

Affected products (37)

• cpe:2.3:a:sophos:anti-virus:3.4.6:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.78:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.78d:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.79:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.80:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.81:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.82:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.83:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.84:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.85:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.86:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.90:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.91:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.95:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:3.96.0:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.03:*:linux:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.04:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.05:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.5.3:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.5.4:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.5.11:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.5.12:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:4.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.0.9:*:linux:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.1:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.2:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:5.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:anti-virus:6.5:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:scanning_engine:2.30.4:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:scanning_engine:2.40.2:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:small_business_suite:4.04:*:*:*:*:*:*:*
• cpe:2.3:a:sophos:small_business_suite:4.05:*:*:*:*:*:*:*

More vulnerabilities in Sophos Anti-virus

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• CVE-2010-2308 — High (CVSS 7.2): Unspecified vulnerability in the filter driver (savonaccessfilter.sys) in Sophos Anti-Virus before 7.6.20 allows local…
• CVE-2008-1737 — Medium (CVSS 6.9): Sophos Anti-Virus 7.0.5, and other 7.x versions, when Runtime Behavioural Analysis is enabled, allows local users to…
• CVE-2007-4578 — Medium (CVSS 6.8): Sophos Anti-Virus for Windows and for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service…
• CVE-2006-5647 — Medium (CVSS 6.4): Sophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before…

All CVEs affecting Sophos Anti-virus →

Other CWE-399 (Resource Management Errors) vulnerabilities

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• CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
• CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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