CVE-2020-9366
A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially crafted output, or a special program, could corrupt memory and crash Screen or possibly have unspecified other impact.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.71% probability · 86th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- gnu/screen
- Source
- cve@mitre.org
EPSS 2.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2020/02/25/1Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/screen-devel/2020-02/msg00007.htmlMailing List, Patch, Release Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202003-62Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/06/3Mailing List, Patch, Release Notes
- http://www.openwall.com/lists/oss-security/2020/02/25/1Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/screen-devel/2020-02/msg00007.htmlMailing List, Patch, Release Notes, Vendor Advisory
- https://security.gentoo.org/glsa/202003-62Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/06/3Mailing List, Patch, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.