CVE-2023-24068
Signal Desktop before 6.2.0 on Windows, Linux, and macOS allows an attacker to modify conversation attachments within the attachments.noindex directory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Signal Desktop before 6.2.0 on Windows, Linux, and macOS allows an attacker to modify conversation attachments within the attachments.noindex directory. Client mechanisms fail to validate modifications of existing cached files, resulting in an attacker's ability to insert malicious code into pre-existing attachments or replace them completely. A threat actor can forward the existing attachment in the corresponding conversation to external groups, and the name and size of the file will not change, allowing the malware to masquerade as another file. NOTE: the vendor disputes the relevance of this finding because the product is not intended to protect against adversaries with this degree of local access.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.37% probability · 31th percentile
- CISA KEV
- Not listed
- Affected
- signal/signal-desktop
- Source
- cve@mitre.org
References
- https://johnjhacking.com/blog/cve-2023-24068-cve-2023-24069/Exploit, Third Party Advisory
- https://signal.org/download/linuxVendor Advisory
- https://signal.org/download/macosVendor Advisory
- https://signal.org/en/download/windowsVendor Advisory
- https://johnjhacking.com/blog/cve-2023-24068-cve-2023-24069/Exploit, Third Party Advisory
- https://signal.org/download/linuxVendor Advisory
- https://signal.org/download/macosVendor Advisory
- https://signal.org/en/download/windowsVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.