Document Title: =============== Google Picasa v3.5 - Local Buffer Overflow Vulnerability References (Source): ==================== OSVDB-ID: 63817 (http://osvdb.org/show/osvdb/63817) EDB-ID: 10489 (http://www.exploit-db.com/exploits/10489/) Release Date: ============= 2011-06-17 Vulnerability Laboratory ID (VL-ID): ==================================== 55 Product & Service Introduction: =============================== Picasa is free photo editing software from Google that makes your pictures look great. Sharing your best photos with friends and family is as easy as pressing a button! ss. (from the vendors homepage: http://picasa.google.com) Abstract Advisory Information: ============================== Vulnerability-Lab discovered a Buffer Overflow in Picasa 3.5 created by Google. Attacker is able to overflow the ECX register by creating a text slide with a large block of text. Vulnerability Disclosure Timeline: ================================== 2009-12-16: Public or Non-Public Disclosure Discovery Status: ================= Published Affected Product(s): ==================== Exploitation Technique: ======================= Local Severity Level: =============== Medium Technical Details & Description: ================================ A wrong validation in the specific software module under videos allows attackers to overwrite the ECX register and crash the program. The vulnerability/bug is detected in the folie add of the software google picasa. The vulnerability allows to crash the software stable but there is no EIP, EBP overwrite. Vulnerable Modules: [+] Folie Pictures: Proof of Concept (PoC): ======================= The vulnerability can be exploited by local attackers & results in a stable application crash via buffer overflow. For demonstration or reproduce ... --- Debug Logs --- EAX 04875910 ASCII “AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... ECX 0000007D EDX 00000000 EBX 049364D0 ASCII “AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... ESP 00129C1C EBP 00129C24 ESI 04939B50 ASCII “AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... EDI 04878F90 ASCII “AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...” EIP 0098C13E Picasa3.0098C13E C 0 ES 0023 32bit 0(FFFFFFFF) P 1 CS 001B 32bit 0(FFFFFFFF) A 0 SS 0023 32bit 0(FFFFFFFF) Z 0 DS 0023 32bit 0(FFFFFFFF) S 0 FS 003B 32bit 7FFDF000(FFF) T 0 GS 0000 NULL D 0 O 0 LastErr ERROR_SUCCESS (00000000) EFL 00010206 (NO,NB,NE,A,NS,PE,GE,G) ST0 empty 23.500000000000000000 ST1 empty 19.000000000000000000 ST2 empty 19.000000000000000000 ST3 empty 0.0 ST4 empty 0.0 ST5 empty 1.0000000000000000000 ST6 empty 0.0 ST7 empty 0.0 3 2 1 0 E S P U O Z D I FST 0020 Cond 0 0 0 0 Err 0 0 1 0 0 0 0 0 (GT) FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1 Solution - Fix & Patch: ======================= N/A Security Risk: ============== An attacker may crash Picasa by inputting a large block of text into a slide in the slideshow maker function of Picasa. The security risk of the vulnerability is estimated as medium. 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