Buffer overflow in Perl

1) Buffer overflow

EUVDB-ID: #VU32068

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12883

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

Buffer overflow in the S_grok_bslash_N function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to disclose sensitive information or cause a denial of service (application crash) via a crafted regular expression with an invalid 'N{U+...}' escape.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Perl: 0.5 - 5.30.3

External links

http://mirror.cucumberlinux.com/cucumber/cucumber-1.0/source/lang-base/perl/patches/CVE-2017-12883.patch
http://www.debian.org/security/2017/dsa-3982
http://www.securityfocus.com/bid/100852
http://bugzilla.redhat.com/show_bug.cgi?id=1492093
http://perl5.git.perl.org/perl.git/commitdiff/2be4edede4ae226e2eebd4eff28cedd2041f300f#patch1
http://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1
http://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1
http://rt.perl.org/Public/Bug/Display.html?id=131598
http://security.netapp.com/advisory/ntap-20180426-0001/
http://www.oracle.com/security-alerts/cpujul2020.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.