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Fencer Vulns
high 7.8

CVE-2020-27828 json

There's a flaw in jasper's jpc encoder in versions prior to 2.0.23.

published 2020-12-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20327

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

There's a flaw in jasper's jpc encoder in versions prior to 2.0.23. Crafted input provided to jasper by an attacker could cause an arbitrary out-of-bounds write. This could potentially affect data confidentiality, integrity, or application availability.

Patch / fix

  • jasper_project jasper 2.0.23
  • jasper Ubuntu 16.04 LTS 1.900.1-debian1-2.4ubuntu1.3

ubuntu advisories UBUNTU-CVE-2020-27828

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

  • jasper RHEL 8 2.0.14-5.el8
  • jasper-libs RHEL 8 2.0.14-5.el8

red hat advisories RHSA-2021:4235

  • jasper SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +14 more 1.900.14-195.25.1
  • jasper SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +12 more 2.0.14-3.19.1
  • jasper SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.900.14-134.33.20.1

suse advisories SUSE-SU-2021:0489-1SUSE-SU-2021:0488-1SUSE-SU-2021:14627-1

  • jasper openSUSE Tumbleweed 2.0.33-1.2
  • jasper openSUSE Leap 15.2 2.0.14-lp152.7.6.1

opensuse advisories openSUSE-SU-2024:10869-1openSUSE-SU-2021:0303-1

  • jasper-libs AlmaLinux 8 2.0.14-5.el8

almalinux advisories ALSA-2021:4235

  • jasper Rocky Linux 8 2.0.14-5.el8

rocky linux advisories RLSA-2021:4235

  • jasper Arch Linux 2.0.24-1

arch linux advisories AVG-1331

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-2020-27828 updated cvss 7.8

jasper: Heap-based buffer overflow in cp_create() in jpc_enc.c

  • Red Hat Enterprise Linux 5 netpbm Red Hat Enterprise Linux 6 jasper, jasper-libs, jasper-utils Red Hat Enterprise Linux 7 jasper, jasper-libs, jasper-utils
    affected: workaround, no fix planned “This flaw can be mitigated for the Jasper tool by not accepting untrusted inputs to be processed by Jasper or constraining rlevels on those inputs from outside of Jasper.”
  • Red Hat CodeReady Linux Builder (v. 8) jasper-devel 2.0.14-5.el8, jasper-debuginfo 2.0.14-5.el8, jasper-debugsource 2.0.14-5.el8, jasper-libs-debuginfo 2.0.14-5.el8, jasper-utils-debuginfo 2.0.14-5.el8 Red Hat Enterprise Linux AppStream (v. 8) jasper 2.0.14-5.el8, jasper-libs 2.0.14-5.el8
    fixed: vendor fix “This flaw can be mitigated for the Jasper tool by not accepting untrusted inputs to be processed by Jasper or constraining rlevels on those inputs from outside of Jasper.” RHSA-2021:4235
  • Red Hat Enterprise Linux 9 jasper, jasper-libs, jasper-utils
    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

1.39% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/jasper-software/jasper/issues/252 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/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

  • n/a jasper

Classification

Weakness
  • CWE-20 Improper Input Validation

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.