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CVE-2020-25467

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which...

5.5 MediumFix available

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.96%Up 0.2 points since Jun 11, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
CVE-2020-25467
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-476
Updated
2026-11-02
CVE List No score

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
CVE-2020-25467
Updated
2026-11-02
EUVDEUVD-2020-18153 No score

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
EUVD-2020-18153
Updated
2026-11-03
GitHub AdvisoriesGHSA-gq2c-wh9x-4gqh 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which...

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
GHSA-gq2c-wh9x-4gqh
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVALPINE-CVE-2020-25467 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
ALPINE-CVE-2020-25467
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
CVE-2020-25467
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-25467 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
DEBIAN-CVE-2020-25467
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-25467 5.5

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

Record
UBUNTU-CVE-2020-25467
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUSN-5840-1 No score

lrzip vulnerabilities

It was discovered that Long Range ZIP incorrectly handled pointers. If a user or an automated system were tricked into opening a certain specially crafted ZIP file, an attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-25467)

It was discovered that Long Range ZIP incorrectly handled pointers. If a user or an automated system were tricked into opening a certain specially crafted ZIP file, an attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-27345, CVE-2021-27347)

It was discovered that Long Range ZIP incorrectly handled pointers. If a user or an automated system were tricked into opening a certain specially crafted ZIP file, an attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2022-26291)

It was discovered that Long Range ZIP incorrectly handled memory allocation, which could lead to a heap memory corruption. An attacker could possibly use this issue to cause denial of service. This issue affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2022-28044)

Record
USN-5840-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
lrzip
Alpine:v3.17
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.18
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.19
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.20
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.21
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.22
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.23
 before 0.640-r0
0.640-r0
lrzip
Alpine:v3.24
 before 0.640-r0
0.640-r0
lrzip
Debian:12
 before 0.640-1
0.640-1
lrzip
Debian:13
 before 0.640-1
0.640-1
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Affected packages
PackageAffectedFixed
lrzip
Debian:14
 before 0.640-1
0.640-1
lrzip
Debian:9
From an advisory covering 5 CVEs
 before 0.631-1+deb9u2, plus listed versions
0.631-10.631-1+deb9u1
0.631-1+deb9u2
lrzip
Ubuntu:Pro:14.04:LTS
 before 0.616-1ubuntu0.1~esm2, plus listed versions
0.608-20.616-10.616-1ubuntu0.1~esm0.616-1ubuntu0.1~esm1
0.616-1ubuntu0.1~esm2
lrzip
Ubuntu:Pro:16.04:LTS
 before 0.621-1ubuntu0.1~esm2, plus listed versions
0.621-10.621-1ubuntu0.1~esm1
0.621-1ubuntu0.1~esm2
lrzip
Ubuntu:18.04:LTS
 before 0.631-1+deb9u3build0.18.04.1, plus listed versions
0.631-10.631-1+deb9u1build0.18.04.1
0.631-1+deb9u3build0.18.04.1
lrzip
Ubuntu:20.04:LTS
 before 0.631+git180528-1+deb10u1build0.20.04.1, plus listed versions
0.631+git180528-10.631+git180528-1build1
0.631+git180528-1+deb10u1build0.20.04.1
lrzip
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.651-2ubuntu1
 None known
lrzip
Ubuntu:25.10
 All versions, plus listed versions
0.651-2ubuntu10.651-3
 None known
lrzip
Ubuntu:26.10
 All versions, plus listed versions
0.660-1
 None known
lrzip
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.651-30.651-3build10.660-1
 None known
lrzip
Ubuntu:Pro:14.04:LTS
From an advisory covering 6 CVEs
 before 0.616-1ubuntu0.1~esm2, plus listed versions
0.608-20.616-10.616-1ubuntu0.1~esm0.616-1ubuntu0.1~esm1
0.616-1ubuntu0.1~esm2
lrzip
Ubuntu:Pro:16.04:LTS
From an advisory covering 6 CVEs
 before 0.621-1ubuntu0.1~esm2, plus listed versions
0.621-10.621-1ubuntu0.1~esm1
0.621-1ubuntu0.1~esm2
lrzip
Ubuntu:18.04:LTS
From an advisory covering 6 CVEs
 before 0.631-1+deb9u3build0.18.04.1, plus listed versions
0.631-10.631-1+deb9u1build0.18.04.1
0.631-1+deb9u3build0.18.04.1
lrzip
Ubuntu:20.04:LTS
From an advisory covering 6 CVEs
 before 0.631+git180528-1+deb10u1build0.20.04.1, plus listed versions
0.631+git180528-10.631+git180528-1build1
0.631+git180528-1+deb10u1build0.20.04.1
lrzip
Ubuntu:22.04:LTS
From an advisory covering 6 CVEs
 before 0.651-2ubuntu0.22.04.1, plus listed versions
0.641-10.651-2
0.651-2ubuntu0.22.04.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-25467 is a medium vulnerability (CVSS 5.5) in Debian Linux, published June 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.96%, the 61st percentile. Fixed in lrzip 0.640-r0.

References

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