CVE-2012-1427: The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Norman Antivirus 6.06.12, and Sophos Anti-Virus 4

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MEDIUM 4.3DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2012-1427 is a medium-severity flaw (CVSS 4.3) affecting quick heal, norman antivirus \& antispyware, sophos anti-virus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Norman Antivirus 6.06.12, and Sophos Anti-Virus 4.61.0 allows remote attackers to bypass malware detection via a POSIX TAR file with a \57\69\6E\5A\69\70 character sequence at a certain location. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different TAR parser implementations.

Why this priority

EPSS top 1%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	87.6% (top 1%)
CISA exploited list	No
Weakness	CWE-264
Published	2012-03-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: cat · norman · sophos

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-03-21 10:11 UTCPublished CVE record published
2026-06-16 23:39 UTCUpdated Record last modified

cat quick heal DOWNGRADE

Affected: 11.00

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.00

1. Check installed version

apt-cache policy quick-heal || rpm -q quick-heal || quick-heal --version

2. No fixed release: DOWNGRADE to a release before 11.00 (Debian / Ubuntu)

apt-cache madison quick-heal sudo apt install quick-heal=<VERSION_BEFORE_11.00> sudo apt-mark hold quick-heal

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quick-heal sudo dnf downgrade quick-heal-<VERSION_BEFORE_11.00> sudo dnf versionlock add quick-heal

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

norman norman antivirus \& antispyware DOWNGRADE

Affected: 6.06.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.06.12

1. Check installed version

apt-cache policy norman-antivirus--antispyware || rpm -q norman-antivirus--antispyware || norman-antivirus--antispyware --version

2. No fixed release: DOWNGRADE to a release before 6.06.12 (Debian / Ubuntu)

apt-cache madison norman-antivirus--antispyware sudo apt install norman-antivirus--antispyware=<VERSION_BEFORE_6.06.12> sudo apt-mark hold norman-antivirus--antispyware

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list norman-antivirus--antispyware sudo dnf downgrade norman-antivirus--antispyware-<VERSION_BEFORE_6.06.12> sudo dnf versionlock add norman-antivirus--antispyware

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

sophos sophos anti-virus DOWNGRADE

Affected: 4.61.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.61.0

1. Check installed version

apt-cache policy sophos-anti-virus || rpm -q sophos-anti-virus || sophos-anti-virus --version

2. No fixed release: DOWNGRADE to a release before 4.61.0 (Debian / Ubuntu)

apt-cache madison sophos-anti-virus sudo apt install sophos-anti-virus=<VERSION_BEFORE_4.61.0> sudo apt-mark hold sophos-anti-virus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sophos-anti-virus sudo dnf downgrade sophos-anti-virus-<VERSION_BEFORE_4.61.0> sudo dnf versionlock add sophos-anti-virus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-1427?

quick heal: downgrade or apply the listed mitigation; norman antivirus \& antispyware: downgrade or apply the listed mitigation; sophos anti-virus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-1427 being exploited?

CVE-2012-1427 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-1427 affect?

CVE-2012-1427 affects quick heal, norman antivirus \& antispyware, sophos anti-virus. Severity is medium (CVSS 4.3). The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Norman Antivirus 6.06.12, and Sophos Anti-Virus 4.61.0 allows remote attackers to bypass malware detection via a POSIX TAR file with a \57\69\6E\5A\69\70 character sequence at a c

How urgent is CVE-2012-1427?

Priority 40/100. EPSS top 1%: very likely to be exploited

Software pages

Sophos vulnerabilities

Related CVEs

CVE-2012-1463 MEDIUM 4.3 DOWNGRADE DOWNGRADE The ELF file parser in AhnLab V3 Internet Security 2011.01.18.00, Bitdefender 7.2, Quick Heal (aka Cat QuickHe
CVE-2012-1462 MEDIUM 4.3 DOWNGRADE DOWNGRADE The ZIP file parser in AhnLab V3 Internet Security 2011.01.18.00, AVG Anti-Virus 10.0.0.1190, Quick Heal (aka
CVE-2012-1460 MEDIUM 4.3 DOWNGRADE DOWNGRADE The Gzip file parser in Antiy Labs AVL SDK 2.0.3.7, Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.
CVE-2012-1456 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in AVG Anti-Virus 10.0.0.1190, Quick Heal (aka Cat QuickHeal) 11.00, Comodo Antivirus 7424
CVE-2012-1452 MEDIUM 4.3 DOWNGRADE DOWNGRADE The CAB file parser in Emsisoft Anti-Malware 5.1.0.1, Ikarus Virus Utilities T3 Command Line Scanner 1.1.97.0,

References

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