CVE-2021-45960

CWE-682CWE-400 — Uncontrolled Resource ConsumptionCWE-13359 documents9 sources
Severity
8.8HIGH
EPSS
0.3%
top 42.84%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Libexpat Project LibexpatSiemens Sinema Remote Connect ServerTenable Nessus+2 more
Timeline
PublishedJan 1
Latest updateFeb 21

Description

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages5 packages

▶Debianexpat< 2.2.10-2+deb11u1+3
▶NVDtenable/nessus10.0.0 — 10.1.1+1

Also affects: Debian Linux 10.0, 11.0

Patches

Patch: cert-portal.siemens.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-pfmv-2r4f-j9mj: In Expat (aka libexpat) before 2↗2022-02-10
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CVEList
CVE-2021-45960: In Expat (aka libexpat) before 2↗2022-01-01
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OSV
CVE-2021-45960: In Expat (aka libexpat) before 2↗2022-01-01
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📋Vendor Advisories

4
Ubuntu
Expat vulnerabilities↗2022-02-21
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Red Hat
expat: Large number of prefixed XML attributes on a single tag can crash libexpat↗2022-01-17
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Microsoft
In Expat (aka libexpat) before 2.4.3 a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g. allocating too few bytes or only freeing memory).↗2022-01-11
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Debian
CVE-2021-45960: expat - In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the...↗2021
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