8.3
CVE-2025-15661
- EPSS 0.27%
- Veröffentlicht 18.06.2026 20:18:29
- Zuletzt bearbeitet 26.06.2026 02:35:13
- Quelle disclosure@vulncheck.com
- CVE-Watchlists
- Unerledigt
Loginlibssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c
libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the missing validation of available packet buffer size before the memcpy operation.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.27% | 0.181 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 6.5 | 2.2 | 4.2 |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
|
| disclosure@vulncheck.com | 8.3 | 0 | 0 |
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
|
| disclosure@vulncheck.com | 6.5 | 2.2 | 4.2 |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
|
CWE-125 Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
https://github.com/libssh2/libssh2/pull/1705
https://github.com/libssh2/libssh2/pull/1717
https://github.com/libssh2/libssh2/commit/2dae3024897e1898d389835151f4e9606227721d
https://www.vulncheck.com/advisories/libssh2-heap-buffer-over-read-via-sftp-symlink-in-sftp-c