libssh2
Version: 1.11.1the SSH library
What is "libssh2"?
the SSH library
How to use this package
Quick install
Installs the package into the current environment for this session. Use --build or --runtime to persist it as a build-time or runtime dependency.
min add libssh2Declare as a task dependency in minimal.toml
Listing the package under tasks.<name>.packages makes it available inside that task’s sandbox.
[tasks.dev]
packages = ["libssh2"]Build-time vs runtime
Choose build-time for tools needed during compilation, runtime for dynamic libraries loaded at runtime.
min add --build libssh2
min add --runtime libssh2Dependencies (8)
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Showing 16 advisories, 5 of which are transitive via libssh2's dependencies
No advisories match the current filters.
| Critical ( 1 ) | ||||||
| Status | IDs | Package | Severity | |||
|---|---|---|---|---|---|---|
| Under investigation | glibc | Critical: 9.8 | ||||
SummaryCalling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow. ViaAffected ranges2.42 – 2.43 CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | ||||||
| High ( 6 ) | ||||||
| Status | IDs | Package | Severity | |||
| Affected: 1.11.1 | libssh2 | High: 7.0 | ||||
Summarylibssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | ||||||
| Affected: 1.11.1 | libssh2 | High: 8.1 | ||||
Summarylibssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | ||||||
| Affected: 1.11.1 | libssh2 | High: 7.3 | ||||
SummaryA security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | ||||||
| Under investigation | glibc | High: 7.5 | ||||
SummaryCalling the ungetwc function on a FILE stream with wide characters encoded in a character set that has overlaps between its single byte and multi-byte character encodings, in the GNU C Library version 2.43 or earlier, may result in an attempt to read bytes before an allocated buffer, potentially resulting in unintentional disclosure of neighboring data in the heap, or a program crash. A bug in the wide character pushback implementation (_IO_wdefault_pbackfail in libio/wgenops.c) causes ungetwc() to operate on the regular character buffer (fp->_IO_read_ptr) instead of the actual wide-stream read pointer (fp->_wide_data->_IO_read_ptr). The program crash may happen in cases where fp->_IO_read_ptr is not initialized and hence points to NULL. The buffer under-read requires a special situation where the input character encoding is such that there are overlaps between single byte representations and multibyte representations in that encoding, resulting in spurious matches. The spurious match case is not possible in the standard Unicode character sets. ViaAffected ranges2.42 – 2.43 CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | ||||||
| Under investigation | glibc | High: 7.5 | ||||
SummaryThe iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application. This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them. ViaAffected ranges2.42 – 2.43 CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | ||||||
| Under investigation | glibc | High: 7.5 | ||||
SummaryCalling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer. ViaAffected ranges2.42 – 2.43 CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | ||||||
| Medium ( 4 ) | ||||||
| Status | IDs | Package | Severity | |||
| Affected: 1.11.1 | libssh2 | Medium: 6.5 | ||||
Summarylibssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | ||||||
| Affected: 1.11.1 | libssh2 | Medium: 6.5 | ||||
Summarylibssh2 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. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H | ||||||
| Affected: 1.11.1 | libssh2 | Medium: 5.9 | ||||
Summarylibssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops. Affected ranges1.11.1 CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | ||||||
| Under investigation | glibc | Medium: 5.4 | ||||
SummaryCalling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C library version 2.34 to version 2.43 could result in an invalid DNS hostname being returned to the caller in violation of the DNS specification. ViaAffected ranges2.42 – 2.43 CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | ||||||
| Low ( 0 ) | ||||||
| Status | IDs | Package | Severity | |||
| Unknown ( 5 ) | ||||||
| Status | IDs | Package | Severity | |||
| Fix unavailable | libssh2 | Unknown | ||||
SummaryNull-dereference READ in _libssh2_packet_add Affected ranges1.11.1 References | ||||||
| Affected: 1.11.1 | libssh2 | Unknown | ||||
SummaryNull-dereference READ in session_startup Affected ranges1.11.0 – 1.11.1 References | ||||||
| Affected: 1.11.1 | libssh2 | Unknown | ||||
SummaryNull-dereference READ in ubsan_GetStackTrace Affected ranges1.11.0 – 1.11.1 References | ||||||
| Affected: 1.11.1 | libssh2 | Unknown | ||||
SummaryNull-dereference READ in _libssh2_packet_add Affected ranges1.11.1 References | ||||||
| Affected: 1.11.1 | libssh2 | Unknown | ||||
SummaryNull-dereference READ in session_startup Affected ranges1.11.0 – 1.11.1 References | ||||||
56 components
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| Packages | Version |
|---|---|
| libssh2 ROOT | 1.11.1 |
| acl | 2.4.0 |
| attr | 2.6.0 |
| autoconf | 2.73 |
| automake | 1.18.1 |
| bash | 5.3 |
| bash-bootstrap | 5.3 |
| binutils | 2.46.1 |
| bison | 3.8.2 |
| bzip2 | 1.0.8 |
| cmake | 4.2.7 |
| coreutils | 9.11 |
| curl | 8.21.0 |
| diffutils | 3.12 |
| expat | 2.8.2 |
| file | 5.48 |
| findutils | 4.10.0 |
| flex | 2.6.4 |
| gawk | 5.4.0 |
| gawk-bootstrap | 5.3.2 |
| gcc | 15.2.0 |
| gdbm | 1.26 |
| glibc | 2.43 |
| gmp | 6.3.0 |
| grep | 3.12 |
| gzip | 1.14 |
| libcap | 2.78 |
| libffi | 3.6.0 |
| libidn2 | 2.3.8 |
| libpsl | 0.22.0 |
| libtool | 2.5.4 |
| libunistring | 1.4.2 |
| libuv | 1.52.1 |
| linux_headers | 6.12.43 |
| lz4 | 1.10.0 |
| m4 | 1.4.21 |
| make | 4.4.1 |
| meson | 1.10.2 |
| mpc | 1.4.0 |
| mpfr | 4.2.2 |
| ncurses | 6.6 |
| ninja | 1.13.2 |
| openssl | 3.6.3 |
| pcre2 | 10.47 |
| perl | 5.42.2 |
| pkgconf | 2.5.1 |
| python | 3.14.6 |
| readline | 8.3 |
| sed | 4.10 |
| setuptools | 83.0.0 |
| sqlite | 3.50.4 |
| tar | 1.35 |
| util-linux | 2.42.2 |
| xz | 5.8.3 |
| zlib | 1.3.2 |
| zstd | 1.5.7 |