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Gracefully handle rare exceptions (i.e.: crashes) while performing GEX tests.

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This commit is contained in:
Joe Testa 2024-02-17 13:44:06 -05:00
parent a958fd1fec
commit 699739d42a
2 changed files with 3 additions and 1 deletions
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1
README.md
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@ -185,6 +185,7 @@ For convenience, a web front-end on top of the command-line tool is available at
- Fixed parsing of ecdsa-sha2-nistp* CA signatures on host keys. Additionally, they are now flagged as potentially back-doored, just as standard host keys are. - Fixed parsing of ecdsa-sha2-nistp* CA signatures on host keys. Additionally, they are now flagged as potentially back-doored, just as standard host keys are.
- The built-in man page (`-m`, `--manual`) is now available on Docker, PyPI, and Snap builds, in addition to the Windows build. - The built-in man page (`-m`, `--manual`) is now available on Docker, PyPI, and Snap builds, in addition to the Windows build.
- Snap builds are now architecture-independent. - Snap builds are now architecture-independent.
- Gracefully handle rare exceptions (i.e.: crashes) while performing GEX tests.
### v3.1.0 (2023-12-20) ### v3.1.0 (2023-12-20)
- Added test for the Terrapin message prefix truncation vulnerability ([CVE-2023-48795](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795)). - Added test for the Terrapin message prefix truncation vulnerability ([CVE-2023-48795](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795)).

3
src/ssh_audit/gextest.py
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@ -21,6 +21,7 @@
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE. THE SOFTWARE.
""" """
import struct
import traceback import traceback
# pylint: disable=unused-import # pylint: disable=unused-import
@ -65,7 +66,7 @@ class GEXTest:
# Parse the server's KEX. # Parse the server's KEX.
_, payload = s.read_packet(2) _, payload = s.read_packet(2)
SSH2_Kex.parse(out, payload) SSH2_Kex.parse(out, payload)
except KexDHException: except (KexDHException, struct.error):
out.v("Failed to parse server's kex. Stack trace:\n%s" % str(traceback.format_exc()), write_now=True) out.v("Failed to parse server's kex. Stack trace:\n%s" % str(traceback.format_exc()), write_now=True)
return False return False