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Fencer Vulns
high 7.5

CVE-2021-35515 in the critical feed json

Apache Commons Compress 1.6 to 1.20 denial of service vulnerability

published 2021-07-13 5 y ago modified 2026-06-17 4 mo ago also GHSA-7hfm-57qf-j43q , EUVD-2021-1620

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.6%
EPSS 11.6% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

When reading a specially crafted 7Z archive, the construction of the list of codecs that decompress an entry can result in an infinite loop. This could be used to mount a denial of service attack against services that use Compress' sevenz package.

Patch / fix

  • maven org.apache.commons:commons-compress 1.21
  • libcommons-compress-java Debian 14, Debian 13, Debian 12 1.21-1

debian advisories DEBIAN-CVE-2021-35515

  • ovirt-web-ui rhev manager 4.4 1.9.0-1.el8ev
  • ovirt-dependencies rhev manager 4.4 4.5.2-1.el8ev
  • apache-commons-compress rhev manager 4.4 1.21-1.2.el8ev
  • apache-commons-compress-javadoc rhev manager 4.4 1.21-1.2.el8ev

red hat advisories RHSA-2022:5555

  • apache-commons-compress SLE Module for Development Tools 15 SP3, SLE Module for Development Tools 15 SP2 1.21-3.3.1

suse advisories SUSE-SU-2021:2612-1

  • apache-commons-compress openSUSE Tumbleweed 1.21-1.2
  • apache-commons-compress openSUSE Leap 15.2 1.21-lp152.2.3.1
  • apache-commons-compress openSUSE Leap 15.3 1.21-3.3.1

opensuse advisories openSUSE-SU-2024:10618-1openSUSE-SU-2021:1115-1openSUSE-SU-2021:2612-1

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-2021-35515 updated cvss 7.5

apache-commons-compress: infinite loop when reading a specially crafted 7Z archive

  • Red Hat Decision Manager 7 apache-commons-compress
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 apache-commons-compress, apache-commons-compress-javadoc Red Hat Enterprise Linux 8 apache-commons-compress, apache-commons-compress-javadoc
    affected: no fix planned “Will not fix”
  • Red Hat Process Automation 7 apache-commons-compress
    affected: no fix planned “Out of support scope”
  • Red Hat Software Collections rh-maven36-apache-commons-compress, rh-maven36-apache-commons-compress-javadoc
    affected: no fix planned “Will not fix”
  • Red Hat Fuse 7.11
    fixed: vendor fix RHSA-2022:5532
  • Red Hat RHEL-8-RHEV-S-4.4 - Red Hat Virtualization Engine 4.4 apache-commons-compress 1.21-1.2.el8ev, apache-commons-compress-javadoc 1.21-1.2.el8ev
    fixed: vendor fix RHSA-2022:5555
  • Red Hat Enterprise Linux 9 apache-commons-compress Red Hat RHEL-8-RHEV-S-4.4 - Red Hat Virtualization Engine 4.4 rhvm 4.5.1.2-0.11.el8ev, ovirt-web-ui 1.9.0-1.el8ev, ovirt-engine-dwh 4.5.3-1.el8ev, ovirt-engine 4.5.1.2-0.11.el8ev, postgresql-jdbc 42.2.14-1.el8ev, rhvm-branding-rhv 4.5.0-1.el8ev, +25 more
    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

11.57% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.commons:commons-compress
<1.21
1.21

Affected products

  • Apache Software Foundation Apache Commons Compress

Classification

Weakness
  • CWE-834 Excessive Iteration
  • CWE-835 Loop with Unreachable Exit Condition

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.