Buffer overflow in Perl
CVE-2018-6797
An issue was discovered in Perl 5.18 through 5.26. A crafted regular expression can cause a heap-based buffer overflow, with control over the bytes written.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.065 (93.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.066 · newest: 0.065 · change: -0.001
Affected products
- Perl
- Canonical Ubuntu Linux — versions 16.04, 17.10
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Server — versions 7.0, 7.3, 7.4
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1042004 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:1192 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1040681 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3625-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2018/dsa-4172 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201909-01 (vendor-advisory)
- www.oracle.com/security-alerts/cpujul2020.html
- rt.perl.org/Public/Bug/Display.html (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-6797?
- CVE-2018-6797 is a critical-severity vulnerability in Perl, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-04-17.
- How severe is CVE-2018-6797?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-6797 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.