CVE-2017-20230

Description

Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow.

CVSS v3.1 Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-121 CWE-121

Affected Products

Vendor	Product	Versions
nwclark	storable	< 3.05

References

Advisories & Patches

https://github.com/Perl/perl5/commit/a258c17c6937f79529c8319a829310e09cdbd216.patch

Other References

https://github.com/Perl/perl5/issues/15831 https://metacpan.org/release/RURBAN/Storable-3.05/changes https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242533.html https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242703.html http://www.openwall.com/lists/oss-security/2026/04/21/5

Frequently Asked Questions

What is CVE-2017-20230? +

Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow. It has a CVSS v3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2017-20230? +

CVE-2017-20230 has a CVSS v3.1 score of 10.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2017-20230? +

CVE-2017-20230 affects products from nwclark, specifically: storable. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2017-20230? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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