PT-2023-6464 · Synapse+1 · Synapse+1

Reivilibre · Published 2023-09-26 · Updated 2024-06-15 · CVE-2023-45129

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Synapse versions prior to 1.94.0

Description The issue is related to a malicious server ACL event that can impact performance temporarily or permanently, leading to a persistent denial of service. Homeservers running on a closed federation are not affected. The vulnerability is associated with unregulated resource distribution.

Recommendations For Synapse versions prior to 1.94.0, upgrade to Synapse 1.94.0 or later. As a temporary workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

ALT-PU-2024-3315

BDU:2023-07183

CVE-2023-45129

GHSA-5CHR-WJW5-3GQ4

OPENSUSE-SU-2024:13320-1

PYSEC-2023-199

Affected Products

Alt Linux

Synapse

References · 28

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45129.json · Exploit
• https://github.com/matrix-org/synapse/pull/16360 · Vendor Advisory
• https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:13320-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-45129 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-45129 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-45129 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-45129 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-45129 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-45129 · Security Note
• https://osv.dev/vulnerability/CVE-2023-45129 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-07183 · Security Note