Описание
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | 1.11.1-4ubuntu1 |
| esm-apps-legacy/xenial | released | 1.5.0-2ubuntu0.1+esm3 |
| esm-apps/bionic | released | 1.8.0-1ubuntu0.1+esm1 |
| esm-apps/focal | released | 1.8.0-2.1ubuntu0.1+esm1 |
| esm-apps/jammy | released | 1.10.0-3ubuntu0.1 |
| esm-infra-legacy/trusty | released | 1.4.3-2ubuntu0.2+esm4 |
| jammy | released | 1.10.0-3ubuntu0.1 |
| noble | released | 1.11.0-4.1ubuntu0.24.04.3 |
| resolute | released | 1.11.1-1ubuntu0.26.04.3 |
| upstream | released | 1.11.1-5 |
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EPSS
7.5 High
CVSS3
Связанные уязвимости
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bo ...
libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.
EPSS
7.5 High
CVSS3