PT-2021-18209 · Sydent · Sydent

Richvdh · Published 2021-04-15 · Updated 2022-08-02 · CVE-2021-29433

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions: Sydent versions 2.2.0 and prior

Description: The issue is related to missing input validation of some parameters on the endpoints used to confirm third-party identifiers, which could cause excessive use of disk space and memory leading to resource exhaustion.

Recommendations: For Sydent versions 2.2.0 and prior, update to version 2.3.0 to resolve the issue. As a temporary workaround, consider restricting access to the endpoints used to confirm third-party identifiers until a patch is applied. Avoid using parameters that are not properly validated on these endpoints until the issue is resolved.

Fix

RCE

Resource Exhaustion

Weakness Enumeration

CWE-20

CWE-400

Related Identifiers

CVE-2021-29433

GHSA-PW4V-GR34-2553

PYSEC-2021-24

Affected Products

Sydent

References · 10

• https://github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553 · Patch
• https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-29433 · Security Note
• https://osv.dev/vulnerability/GHSA-pw4v-gr34-2553 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29433 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-24 · Vendor Advisory
• https://github.com/matrix-org/sydent · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml · Note
• https://pypi.org/project/matrix-sydent · Note
• https://t.me/cvenotify/15684 · Telegram Post