CVE-2012-4561 The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an er...
MediumCVSS 5.0
EPSS 4.8%
- Published
- Updated
- Exploit status
- No public exploit known
Description
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/libssh(Debian:12) | < 0.5.3-1 | 0.5.3-1 |
| debian/libssh(Debian:13) | < 0.5.3-1 | 0.5.3-1 |
| debian/libssh(Debian:14) | < 0.5.3-1 | 0.5.3-1 |
| libssh | <= 0.5.2 | No fix listed |
| libssh | = 0.4.7 | No fix listed |
| libssh | = 0.4.8 | No fix listed |
| libssh | = 0.5.0 | No fix listed |
| libssh | = 0.5.0-rc1 | No fix listed |
| libssh | = 0.5.1 | No fix listed |
References
- Debian Security Tracker CVE-2012-4561 vendor-advisory
- FEDORA-2012-18610 vendor-advisory
- FEDORA-2012-18677 vendor-advisory
- openSUSE-SU-2012:1620 vendor-advisory
- openSUSE-SU-2012:1622 vendor-advisory
- openSUSE-SU-2013:0130 vendor-advisory
- DSA-2577 vendor-advisory
- www.libssh.org vendor-advisory
- MDVSA-2012:175 vendor-advisory
- [oss-security] 20121120 libssh 0.5.3 release fixes multiple security issues mailing-list
- 56604 vdb-entry
- USN-1640-1 vendor-advisory
- bugzilla.redhat.com
- libssh-multiple-dos(80220) vdb-entry