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Fencer Vulns
medium 6.5

CVE-2020-36149 json

Incorrect handling of input data in changeAttribute function in the libmysofa library 0.5 - 1.1 will lead to NULL pointer dereference and s…

published 2021-02-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23727

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

Incorrect handling of input data in changeAttribute function in the libmysofa library 0.5 - 1.1 will lead to NULL pointer dereference and segmentation fault error in case of restrictive memory protection or near NULL pointer overwrite in case of no memory restrictions (e.g. in embedded environments).

Patch / fix

  • libmysofa Debian 14, Debian 13, Debian 12 1.2~dfsg0-1

debian advisories DEBIAN-CVE-2020-36149

  • libmysofa Ubuntu 22.04 LTS 1.2~dfsg0-1

ubuntu advisories UBUNTU-CVE-2020-36149

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

  • libmysofa Package Hub 15 SP2 0.9.1-bp152.4.3.1
  • libmysofa openSUSE Leap 15.2 0.9.1-lp152.3.3.1

opensuse advisories openSUSE-SU-2021:0459-1openSUSE-SU-2021:0444-1

  • libmysofa Arch Linux 1.2-1

arch linux advisories AVG-1547

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-2020-36149 updated cvss 6.5

libmysofa: Incorrect handling of input data in changeAttribute function

  • 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

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/hoene/libmysofa/issues/137 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/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.