CVE-2012-6063 Use after free in n/a
A double free vulnerability in libssh allows remote attackers to cause a crash and potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-6063?
CVE-2012-6063 is a high-severity use after free vulnerability in n/a, published on 30 Nov 2012. It can be exploited over the network, with no action from the victim.
Official description
Double free vulnerability in the sftp_mkdir function in sftp.c in libssh before 0.5.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors, a different vector than CVE-2012-4559.
Weakness: CWE-399
Which versions are affected by CVE-2012-6063?
It affects 1 product.
Products include Libssh Libssh.
How do I fix CVE-2012-6063?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2012-6063 being exploited?
There is no known exploitation of CVE-2012-6063 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2026-59851 Libssh: libssh: authentication bypass via missing gssapi principal check
- CVE-2025-5987 Libssh: invalid return code for chacha20 poly1305 with openssl backend
- CVE-2025-14821 Libssh: libssh: insecure default configuration leads to local man-in-the-middle attacks on windows
- CVE-2012-4560 Memory corruption in n/a
- CVE-2012-4562 Integer overflow in n/a
Sources
Also known as DEBIAN-CVE-2012-6063, GHSA-fgm4-g835-pxpp.