Описание
Security update for squid
This update for squid to version 4.11 fixes the following issues:
- CVE-2020-11945: Fixed a potential remote code execution vulnerability when using HTTP Digest Authentication (bsc#1170313).
- CVE-2019-12519, CVE-2019-12521: Fixed incorrect buffer handling that can result in cache poisoning, remote execution, and denial of service attacks when processing ESI responses (bsc#1169659).
- CVE-2020-8517: Fixed a possible denial of service caused by incorrect buffer management ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691).
- CVE-2019-12528: Fixed possible information disclosure when translating FTP server listings into HTTP responses (bsc#1162689).
- CVE-2019-18860: Fixed handling of invalid domain names in cachemgr.cgi (bsc#1167373).
Список пакетов
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
Ссылки
- Link for SUSE-SU-2020:1134-1
- E-Mail link for SUSE-SU-2020:1134-1
- SUSE Security Ratings
- SUSE Bug 1162689
- SUSE Bug 1162691
- SUSE Bug 1167373
- SUSE Bug 1169659
- SUSE Bug 1170313
- SUSE CVE CVE-2019-12519 page
- SUSE CVE CVE-2019-12521 page
- SUSE CVE CVE-2019-12528 page
- SUSE CVE CVE-2019-18860 page
- SUSE CVE CVE-2020-11945 page
- SUSE CVE CVE-2020-8517 page
Описание
An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.
Затронутые продукты
Ссылки
- CVE-2019-12519
- SUSE Bug 1169659
Описание
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
Затронутые продукты
Ссылки
- CVE-2019-12521
- SUSE Bug 1169659
Описание
An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non-Squid processes.
Затронутые продукты
Ссылки
- CVE-2019-12528
- SUSE Bug 1162689
Описание
Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi.
Затронутые продукты
Ссылки
- CVE-2019-18860
- SUSE Bug 1167373
Описание
An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).
Затронутые продукты
Ссылки
- CVE-2020-11945
- SUSE Bug 1170313
Описание
An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.
Затронутые продукты
Ссылки
- CVE-2020-8517
- SUSE Bug 1162691