Vulnerabilities > CVE-2014-9769 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Pcre 8.35
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
LOW Integrity impact
LOW Availability impact
LOW Summary
pcre_jit_compile.c in PCRE 8.35 does not properly use table jumps to optimize nested alternatives, which allows remote attackers to cause a denial of service (stack memory corruption) or possibly have unspecified other impact via a crafted string, as demonstrated by packets encountered by Suricata during use of a regular expression in an Emerging Threats Open ruleset.
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
| NASL family | Ubuntu Local Security Checks |
| NASL id | UBUNTU_USN-2943-1.NASL |
| description | It was discovered that PCRE incorrectly handled certain regular expressions. A remote attacker could use this issue to cause applications using PCRE to crash, resulting in a denial of service, or possibly execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 90306 |
| published | 2016-04-01 |
| reporter | Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/90306 |
| title | Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : pcre3 vulnerabilities (USN-2943-1) |
| code | |
References
- http://vcs.pcre.org/pcre?view=revision&revision=1475
- http://vcs.pcre.org/pcre?view=revision&revision=1475
- http://www.openwall.com/lists/oss-security/2016/03/26/1
- http://www.openwall.com/lists/oss-security/2016/03/26/1
- http://www.securityfocus.com/bid/85570
- http://www.securityfocus.com/bid/85570
- http://www.securitytracker.com/id/1035424
- http://www.securitytracker.com/id/1035424
- https://bugs.debian.org/819050
- https://bugs.debian.org/819050
- https://redmine.openinfosecfoundation.org/issues/1693
- https://redmine.openinfosecfoundation.org/issues/1693