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Fencer Intel
high 7.5

CVE-2019-3817 json

A use-after-free flaw has been discovered in libcomps before version 0.1.10 in the way ObjMRTrees are merged.

published 7y ago modified 4mo ago also EUVD-2019-13440

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

A use-after-free flaw has been discovered in libcomps before version 0.1.10 in the way ObjMRTrees are merged. An attacker, who is able to make an application read a crafted comps XML file, may be able to crash the application or execute malicious code.

Patch / fix

  • rpm libcomps 0.1.10
  • yum RHEL 8 4.2.7-6.el8
  • dnf RHEL 8 4.2.7-6.el8
  • libdnf RHEL 8 0.35.1-8.el8
  • librepo RHEL 8 1.10.3-3.el8
  • librhsm RHEL 8 0.0.3-3.el8
  • libsolv RHEL 8 0.7.4-3.el8
  • dnf-data RHEL 8 4.2.7-6.el8
  • libcomps RHEL 8 0.1.11-2.el8

red hat advisories RHSA-2019:3583RHSA-2019:3898

  • libcomps Package Hub 15 0.1.8-bp150.3.3.1

opensuse advisories openSUSE-SU-2019:0328-1

Is CVE-2019-3817 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.

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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-2019-3817 updated cvss 7.5

libcomps: use after free when merging two objmrtrees

  • Red Hat Enterprise Linux 7 Extras libcomps 0.1.8-13.el7, python2-libcomps 0.1.8-13.el7
    fixed: vendor fix RHSA-2019:3898
  • Red Hat Enterprise Linux AppStream (v. 8) createrepo_c 0.11.0-3.el8, createrepo_c-libs 0.11.0-3.el8, python3-createrepo_c 0.11.0-3.el8 Red Hat Enterprise Linux BaseOS (v. 8) dnf 4.2.7-6.el8, yum 4.2.7-6.el8, libdnf 0.35.1-8.el8, librhsm 0.0.3-3.el8, libsolv 0.7.4-3.el8, dnf-data 4.2.7-6.el8, +13 more
    fixed: vendor fix RHSA-2019:3583

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

1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3817 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/rpm-software-management/libcomps/issues/41 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • libcomps libcomps

Classification

Weakness

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.