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Fencer Intel
medium 6.5

CVE-2017-8834 json

The cr_tknzr_parse_comment function in cr-tknzr.c in libcroco 0.6.12 allows remote attackers to cause a denial of service (memory allocatio…

published 9y ago modified 4mo ago also EUVD-2017-17776

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

The cr_tknzr_parse_comment function in cr-tknzr.c in libcroco 0.6.12 allows remote attackers to cause a denial of service (memory allocation error) via a crafted CSS file.

Patch / fix

  • libcroco Ubuntu 20.04 LTS 0.6.13-1ubuntu0.1
  • libcroco Ubuntu Pro 14.04 LTS 0.6.8-2ubuntu1+esm1
  • libcroco Ubuntu Pro 16.04 LTS 0.6.11-1ubuntu0.1~esm1
  • libcroco Ubuntu Pro 18.04 LTS 0.6.12-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2017-8834

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

  • libcroco SLE Module for Basesystem 15 SP1 0.6.12-4.3.51
  • libcroco SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +5 more 0.6.11-12.3.1

suse advisories SUSE-SU-2020:1535-1SUSE-SU-2019:1468-1

  • libcroco openSUSE Leap 15.1 0.6.12-lp151.4.3.1

opensuse advisories openSUSE-SU-2020:0780-1

  • libcroco Alpine 3.11, Alpine 3.10 0.6.13-r1
  • libcroco Alpine 3.7 0.6.12-r1
  • libcroco Alpine 3.9, Alpine 3.8 0.6.12-r2

alpine advisories ALPINE-CVE-2017-8834

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2017-8834 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2017-8834 updated cvss 3.3

libcroco: Memory allocation failure in the cr_tknzr_parse_comment function

  • Red Hat Enterprise Linux 5 libcroco Red Hat Enterprise Linux 6 libcroco Red Hat Enterprise Linux 7 libcroco
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 libcroco
    affected: no fix available

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

3.83% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • exploit-db.com https://www.exploit-db.com/exploits/42147/ referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2020/08/13/3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/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
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel 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.