high
7.5
CWE
125
Advisory Published
CVE Published
Updated

CVE-2018-6798

First published: Wed Feb 21 2018(Updated: )

A flaw was found in Perl 5. A heap read overflow in regexec.c file may allow an attacker to cause a segmentation fault which might lead to a Denial of Service (DoS) or, possibly, heap memory disclosure. Matching a crafted locale dependent regular expression can cause a heap buffer read overflow and potentially information disclosure while reporting an error message. That error message includes bytes beyond the end of the string, and possibly beyond the end of the buffer, providing a potential information disclosure if the memory had contained any sensitive information.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Perl Perl>=5.22<=5.26
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
Redhat Enterprise Linux Server=6.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server=7.3
Redhat Enterprise Linux Server=7.4
Redhat Enterprise Linux Server=7.5
Redhat Enterprise Linux Workstation=6.0
Redhat Enterprise Linux Workstation=7.0
redhat/perl<5.26.2
5.26.2
redhat/perl<5.24.4
5.24.4
debian/perl
5.32.1-4+deb11u3
5.32.1-4+deb11u1
5.36.0-7+deb12u1
5.38.2-5

Remedy

https://perl5.git.perl.org/perl.git/commitdiff/0abf1e8d89aecd32dbdabda5da4d52a2d57a7cff

Remedy

https://perl5.git.perl.org/perl.git/commitdiff/f65da1ca2eee74696d9c120e9d69af37b4fa1920

Remedy

https://perl5.git.perl.org/perl.git/commitdiff/8e6f44c90c7fa1f63c19a44c45482b09a407e15b

Remedy

https://perl5.git.perl.org/perl.git/commitdiff/8b80ce67ff257aaa36e47eaf4194d27a51595524

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Reference Links

Frequently Asked Questions

  • What is CVE-2018-6798?

    CVE-2018-6798 is a vulnerability in Perl versions 5.22 through 5.26 that can cause a heap-based buffer over-read and potentially information disclosure.

  • How severe is CVE-2018-6798?

    CVE-2018-6798 has a severity rating of 7.5 (high).

  • Which software versions are affected by CVE-2018-6798?

    Perl versions 5.22 through 5.26 are affected by CVE-2018-6798.

  • What is the remedy for CVE-2018-6798 in Ubuntu?

    For Ubuntu, the remedy for CVE-2018-6798 is to update the 'perl' package to version 5.22.1-9ubuntu0.3 or 5.26.0-8ubuntu1.1 depending on the Ubuntu version.

  • Where can I find more information about CVE-2018-6798?

    More information about CVE-2018-6798 can be found at the following references: [CVE-2018-6798](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6798), [Ubuntu Security Notice USN-3625-1](https://ubuntu.com/security/notices/USN-3625-1), [NVD CVE-2018-6798](https://nvd.nist.gov/vuln/detail/CVE-2018-6798).

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