AZL-93402
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-93402.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-93402
- Upstream
- Published
- 2026-07-24T17:17:35Z
- Modified
- 2026-08-30T05:26:50Z
- Summary
- CVE-2026-66033 affecting package libssh2 for versions less than 1.11.1-5
- Details
-
libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt() function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash before any authentication occurs.
- References