CVE-2017-6891 Memory corruption in GnuTLS libtasn1
A stack-based buffer overflow in libtasn1 allows attackers to execute arbitrary code or cause denial of service via a crafted assignments file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2017-6891?
CVE-2017-6891 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 22 May 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Two errors in the "asn1_find_node()" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based buffer overflow by tricking a user into processing a specially crafted assignments file via the e.g. asn1Coding utility.
Weakness: CWE-787
Which versions are affected by CVE-2017-6891?
It affects 3 products.
Products include Apache Bookkeeper, Debian Debian Linux, Gnu Libtasn1.
How do I fix CVE-2017-6891?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-6891 being exploited?
There is no known exploitation of CVE-2017-6891 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
- CVE-2019-17571 Deserialization of Untrusted Data in Log4j
- CVE-2020-36230 A flaw was discovered in OpenLDAP before 2.4.57 leading in an assertion failure in slapd in the X.509 DN parsing in decode.c ber_next_elemen
- CVE-2019-19906 Memory corruption in n/a
- CVE-2020-23922 Memory corruption in n/a
- CVE-2022-32531 Apache BookKeeper: Java Client Uses Connection to Host that Failed Hostname Verification
Sources
Also known as ALPINE-CVE-2017-6891, DEBIAN-CVE-2017-6891, DLA-950-1, DSA-3861-1, GHSA-ch46-3x6h-7qrw, MGASA-2017-0159 and 2 more.