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Fencer Vulns
medium 6.5

CVE-2017-18199 json

realloc_symlink in rock.c in GNU libcdio before 1.0.0 allows remote attackers to cause a denial of service (NULL Pointer Dereference) via a…

published 2018-02-24 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9332

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

realloc_symlink in rock.c in GNU libcdio before 1.0.0 allows remote attackers to cause a denial of service (NULL Pointer Dereference) via a crafted iso file.

Patch / fix

  • gnu libcdio 1.0.0
  • libcdio Debian 14, Debian 13, Debian 12 1.0.0-1

debian advisories DEBIAN-CVE-2017-18199

  • libcdio Ubuntu Pro 14.04 LTS 0.83-4.1ubuntu1+esm1
  • libcdio Ubuntu Pro 16.04 LTS 0.83-4.2ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2017-18199

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libcdio RHEL 7 0.92-3.el7

red hat advisories RHSA-2018:3246

  • libcdio SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +1 more 0.90-6.6.5
  • libcdio SLE Point of Sale 11 SP3 0.80-8.3.5
  • libcdio SLE Module for Desktop Applications 15 0.94-6.3.1

suse advisories SUSE-SU-2020:3023-1SUSE-SU-2020:14498-1SUSE-SU-2018:2236-1

  • libcdio Arch Linux 1.0.0-1

arch linux advisories AVG-638

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-18199 updated cvss 2.8

libcdio: NULL pointer dereference in realloc_symlink in rock.c

  • Red Hat Enterprise Linux 6 libcdio
    affected: no fix available
  • Red Hat Enterprise Linux Client (v. 7) libcdio 0.92-3.el7 Red Hat Enterprise Linux Client Optional (v. 7) libcdio-devel 0.92-3.el7, libcdio-debuginfo 0.92-3.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcdio 0.92-3.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) libcdio 0.92-3.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) libcdio-devel 0.92-3.el7, libcdio-debuginfo 0.92-3.el7 Red Hat Enterprise Linux Server (v. 7) libcdio 0.92-3.el7
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 7) libcdio-devel 0.92-3.el7, libcdio-debuginfo 0.92-3.el7 Red Hat Enterprise Linux Workstation (v. 7) libcdio 0.92-3.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libcdio-devel 0.92-3.el7, libcdio-debuginfo 0.92-3.el7
    fixed: vendor fix RHSA-2018:3246
  • Red Hat Enterprise Linux 8 libcdio
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.26% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • savannah.gnu.org https://savannah.gnu.org/bugs/?52264 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.