Improper input validation in Perl
CVE-2015-8853
The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Perl
- Fedoraproject Fedora — versions 22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201701-75 (vendor-advisory)
- www.openwall.com/lists/oss-security/2016/04/20/7 (mailing-list)
- usn.ubuntu.com/3625-2/ (vendor-advisory)
- www.openwall.com/lists/oss-security/2016/04/20/5 (mailing-list)
- rt.perl.org/Public/Bug/Display.html
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- www.securityfocus.com/bid/86707 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay
Frequently asked questions
- What is CVE-2015-8853?
- CVE-2015-8853 is a high-severity vulnerability in Perl, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-05-25.
- How severe is CVE-2015-8853?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2015-8853 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.