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Fencer Vulns
medium 5.3

CVE-2020-20739 json

im_vips2dz in /libvips/libvips/deprecated/im_vips2dz.c in libvips before 8.8.2 has an uninitialized variable which may cause the leakage of…

published 2020-11-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-13519

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

im_vips2dz in /libvips/libvips/deprecated/im_vips2dz.c in libvips before 8.8.2 has an uninitialized variable which may cause the leakage of remote server path or stack address.

Patch / fix

  • libvips libvips 8.8.2
  • vips Debian 14, Debian 13, Debian 12 8.9.0-1

debian advisories DEBIAN-CVE-2020-20739

  • vips Ubuntu Pro 16.04 LTS 8.2.2-1ubuntu0.1~esm1
  • vips Ubuntu Pro 18.04 LTS 8.4.5-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-20739

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

  • vips Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 8.9.0-r0

alpine advisories ALPINE-CVE-2020-20739

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

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-2020-20739 updated cvss 7.7

vips: uninitialized variable in im_vips2dz function in im_vips2dz.c may leak remote server path or stack address

  • Red Hat All currently supported Red Hat products
    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

1.81% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libvips/libvips/issues/1419 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-909 Missing Initialization of Resource

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.