CVE-2011-1487

CVE-2011-1487 is a medium-severity vulnerability in Perl with a CVSS 2.0 base score of 5.0. 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-264.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 9% (94th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Perl
• Published: 2011-04-11
• Last modified: 2026-06-16

Description

The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string.

Frequently asked questions

What is CVE-2011-1487?

The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string.

How severe is CVE-2011-1487?

CVE-2011-1487 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-1487 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1487?

CVE-2011-1487 primarily affects Perl. In total, 40 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1487?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1487 published?

CVE-2011-1487 was published on 2011-04-11 and last updated on 2026-06-16.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057891.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057971.html
• http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
• http://openwall.com/lists/oss-security/2011/04/01/3
• http://openwall.com/lists/oss-security/2011/04/04/35
• http://perl5.git.perl.org/perl.git/commit/539689e74a3bcb04d29e4cd9396de91a81045b99
• http://rt.perl.org/rt3/Public/Bug/Display.html?id=87336
• http://secunia.com/advisories/43921
• http://secunia.com/advisories/44168
• http://www.debian.org/security/2011/dsa-2265
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:091
• http://www.securityfocus.com/bid/47124
• https://bugzilla.redhat.com/show_bug.cgi?id=692844
• https://bugzilla.redhat.com/show_bug.cgi?id=692898
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66528

Affected products (40)

• cpe:2.3:a:perl:perl:5.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.10.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.10.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.10.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.10.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.0:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.1:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.2:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.3:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.4:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.5:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.6:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.7:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.8:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.9:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.10:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.13.11:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.1:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.2:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.3:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.4:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.11.5:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc0:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.0:rc5:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.1:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.2:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.2:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.3:*:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.3:rc1:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.3:rc2:*:*:*:*:*:*
• cpe:2.3:a:perl:perl:5.12.3:rc3:*:*:*:*:*:*

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