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Fencer Vulns
high 8.1

CVE-2020-18771 json

Exiv2 0.27.99.0 has a global buffer over-read in Exiv2::Internal::Nikon1MakerNote::print0x0088 in nikonmn_int.cpp which can result in an in…

published 2021-08-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-0075

cvss
8.1
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 79%
public exploits
0
none known

Summary

Exiv2 0.27.99.0 has a global buffer over-read in Exiv2::Internal::Nikon1MakerNote::print0x0088 in nikonmn_int.cpp which can result in an information leak.

Patch / fix

  • exiv2 Debian 14, Debian 13, Debian 12 0.27.2-6

debian advisories DEBIAN-CVE-2020-18771

  • exiv2 Ubuntu Pro 16.04 LTS 0.25-2.1ubuntu16.04.7+esm5
  • exiv2 Ubuntu Pro 18.04 LTS 0.25-3.1ubuntu0.18.04.11+esm1

ubuntu advisories UBUNTU-CVE-2020-18771

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

  • exiv2 Arch Linux 0.27.1-1

arch linux advisories AVG-614

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-2020-18771 updated cvss 3.5

exiv2: buffer overflow in Exiv2::Internal::Nikon1MakerNote::print0x0088 in nikonmn_int.cpp

  • Red Hat Enterprise Linux 6 exiv2, exiv2-libs Red Hat Enterprise Linux 7 exiv2, exiv2-libs, compat-exiv2-023, compat-exiv2-026
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 exiv2, exiv2-libs, compat-exiv2-026
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 exiv2, exiv2-libs
    affected: no fix available “Fix deferred”

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.83% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Exiv2/exiv2/issues/756 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/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.