CVE-2009-0846 Use after free in n/a
Remote attackers can crash the Kerberos daemon or execute arbitrary code via invalid DER encoding in the ASN.1 decoder.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-0846?
CVE-2009-0846 is a critical use after free vulnerability in Apple Mac Os X, published on 9 Apr 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.
Weakness: CWE-824
Which versions are affected by CVE-2009-0846?
It affects 9 products.
Linux distribution packages (40)
krb5 Red Hat:enterprise_linux:2.1::as | All versions | 0:1.2.2-49 |
krb5-devel Red Hat:enterprise_linux:2.1::as | All versions | 0:1.2.2-49 |
krb5-libs Red Hat:enterprise_linux:2.1::as | All versions | 0:1.2.2-49 |
krb5-server Red Hat:enterprise_linux:2.1::as | All versions | 0:1.2.2-49 |
krb5-workstation Red Hat:enterprise_linux:2.1::as | All versions | 0:1.2.2-49 |
krb5 Red Hat:enterprise_linux:2.1::aw | All versions | 0:1.2.2-49 |
krb5-devel Red Hat:enterprise_linux:2.1::aw | All versions | 0:1.2.2-49 |
krb5-libs Red Hat:enterprise_linux:2.1::aw | All versions | 0:1.2.2-49 |
krb5-server Red Hat:enterprise_linux:2.1::aw | All versions | 0:1.2.2-49 |
krb5-workstation Red Hat:enterprise_linux:2.1::aw | All versions | 0:1.2.2-49 |
krb5 Red Hat:enterprise_linux:2.1::es | All versions | 0:1.2.2-49 |
krb5-devel Red Hat:enterprise_linux:2.1::es | All versions | 0:1.2.2-49 |
krb5-libs Red Hat:enterprise_linux:2.1::es | All versions | 0:1.2.2-49 |
krb5-server Red Hat:enterprise_linux:2.1::es | All versions | 0:1.2.2-49 |
krb5-workstation Red Hat:enterprise_linux:2.1::es | All versions | 0:1.2.2-49 |
krb5 Red Hat:enterprise_linux:2.1::ws | All versions | 0:1.2.2-49 |
krb5-devel Red Hat:enterprise_linux:2.1::ws | All versions | 0:1.2.2-49 |
krb5-libs Red Hat:enterprise_linux:2.1::ws | All versions | 0:1.2.2-49 |
krb5-server Red Hat:enterprise_linux:2.1::ws | All versions | 0:1.2.2-49 |
krb5-workstation Red Hat:enterprise_linux:2.1::ws | All versions | 0:1.2.2-49 |
krb5 Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5-debuginfo Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5-devel Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5-libs Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5-server Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5-workstation Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-70 |
krb5 Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5-debuginfo Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5-devel Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5-libs Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5-server Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5-workstation Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-70 |
krb5 Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5-debuginfo Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5-devel Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5-libs Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5-server Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5-workstation Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-70 |
krb5 Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-70 |
krb5-debuginfo Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-70 |
Products include Apple Mac Os X, Canonical Ubuntu Linux, Fedoraproject Fedora, Mit Kerberos 5, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop and 3 more.
How do I fix CVE-2009-0846?
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-2009-0846 being exploited?
There is no known exploitation of CVE-2009-0846 in the wild and no public exploit code.
Other vulnerabilities in Apple Mac Os X
Sources
Also known as DEBIAN-CVE-2009-0846, GHSA-777p-gw55-q56c, RHSA-2009:0409, RHSA-2009:0410.