CVE-2023-20135
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2023
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
A vulnerability in Cisco IOS XR Software image verification checks could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. This vulnerability is due to a time-of-check, time-of-use (TOCTOU) race condition when an install query regarding an ISO image is performed during an install operation that uses an ISO image. An attacker could exploit this vulnerability by modifying an ISO image and then carrying out install requests in parallel. A successful exploit could allow the attacker to execute arbitrary code on an affected device.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Cisco IOS XR Software
- Vendor
- Cisco
- Product
- Cisco IOS XR Software
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7.5.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.5.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.5.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.7.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.7.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.7.21 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.8.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.8.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.9.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.9.2 | affected | Unavailable | Unavailable | Unavailable | None listed |